East Windsor’s back in play, and now South Windsor’s a candidate, too.

MMCT Venture, the Mashantucket Pequot-Mohegan partnership pursuing a third Connecticut casino, announced Monday that it has accepted new site proposals from the two north-central Connecticut towns, adding them to a mix that already included East Hartford, Hartford and Windsor Locks.

The tribes, bent on blunting the impact of MGM Springfield, the $950 million resort casino under construction in Massachusetts, hope to build a $200 million to $300 million “satellite” facility in the Interstate 91 corridor provided the state legislature legalizes commercial gaming. Jobs and revenue provided by the Mashantuckets’ Foxwoods Resort Casino and the Mohegans’ Mohegan Sun are at stake, the tribes say.

MGM Resorts International, developer of the Massachusetts resort, has repeated its negative critique of the tribes’ state-sanctioned request for casino proposals.

“As we have been saying for quite some time, this so-called process is a sham,” Alan Feldman, an MGM executive vice president, said in a statement. “As a result of the passage of Special Act 15-7, the state is forced to let MMCT do whatever it wants, whenever it wants, and however it wants. If the state really wants to maximize the revenue and jobs associated with its first commercial casino, it should repeal 15-7 and do what every other state does: have a fair, open, transparent, competitive process.”

MGM Resorts has sued state officials over the law that enabled the tribes to form their joint venture. A U.S. District Court judge granted the state’s motion to dismiss the suit, prompting MGM to appeal. The 2nd U.S. Circuit Court of Appeals will hear oral arguments in the case Nov. 28 in Manhattan.

South Windsor’s casino bid involves a vacant, “shovel-ready” development zone along I-291 between I-84 and I-91, according to Matthew Galligan, the town manager.

Galligan said South Windsor wasn’t ready to submit a proposal when MMCT Venture first sought them last year. But when the tribes reopened the process a month ago, “We thought we should take a shot,” he said.

“We’re eight minutes out of Hartford,” Galligan said. “I think it’s a great site. We’re ready to go — there’s sewer, water and gas service there now. It’s very viable.”

South Windsor is partnering with DCK Worldwide, an international construction firm that has agreed to develop 22 town-owned acres at the site, Galligan said.

DCK has built “high-end multifamily, hospitality and retail projects, and hundreds of other facilities in every construction market,” the company’s website says.

East Windsor, whose response to the tribes’ original request for site proposals was rejected, resurrected a plan that involves three parcels off I-91 that are occupied by a former Showcase Cinemas building, a former Walmart and an existing Big Y supermarket, First Selectman Robert Maynard said.

The tribes eliminated East Windsor’s original proposal for a different site when a developer holding options on the property involved allowed those options to lapse. At the time, the developer, Centerplan Companies of Middletown, was involved in a stadium project in Hartford.

Maynard said the owners of the parcels involved in East Windsor’s latest submission want to sell their property.

“Everyone’s in general agreement that the site we’re now proposing is a good one,” the first selectman said. “It’s adjacent to (Interstate) 91 and Route 5 is on another side. It would suit the town very well to have this developed. … It would significantly increase our grand list (of taxable property) and bring in jobs. It would definitely be a positive thing.”

The tribes reopened the application process after receiving amended plans from applicants that responded to the initial call for proposals in 2015.

“Now more than ever, the Mashantucket Pequot and Mohegan tribes are confident that the site we select will make our facility competitive with MGM Springfield,” Kevin Brown, chairman of the Mohegan Tribal Council, said Monday in a statement. “We look forward to reviewing and comparing these new and amended submissions and continuing a dialogue with Connecticut’s communities about how we can work together to save jobs and revenue in our state.”

“Our two tribes are now one step closer to keeping thousands of jobs and millions of dollars within Connecticut’s borders,” Rodney Butler, the Mashantucket chairman, added. “MMCT Venture is eager to explore our options, and ultimately build this facility in a community that values the tax revenue we’ll bring to the town’s grand list.”

Pearce Real Estate administered the application process.

Developers pitching East Hartford’s proposal submitted a new site plan late last week and indicated they would post related material on the town’s website.

“When it comes to openness and transparency throughout the entirety of this process, East Hartford ranks second to no one,” Tony Ravosa, Silver Lane Partners managing member, said in an email. “Nothing about East Hartford or our proposal has been conducted behind closed doors or in executive session, nor have we been coy when it comes to releasing information publicly. It’s all out there.”

In early September, Silver Lane Partners amended its original plan to include a link to a downtown Hartford hotel. The plan calls for shuttles to operate between the Radisson Hotel Hartford and the East Hartford casino, which would be built off Interstate 84 on a site occupied by another former Showcase Cinemas building.

Silver Lane Partners’ newly revised proposal would accommodate a 300,000-square-foot entertainment and gaming venue on the Showcase Cinemas property, “along with structured parking for 3,700 vehicles.”

“For a multitude of reasons, our vision for the Radisson and linkage to downtown Hartford is something that MMCT should absolutely consider, but it doesn’t fundamentally change or alter our development plan for the Showcase site,” Ravosa wrote. “We believe our concept for the Radisson to be a huge added plus with strong regional impact, not the least of which is having a dynamic Mohegan Sun-Foxwoods presence on the downtown Hartford skyline at the most heavily trafficked highway interchange in the state of CT.”

Ravosa wrote that it would be “a huge mistake” for the state to authorize a casino project without considering its regional impact.

In Windsor Locks, proposals filed last year by the Connecticut Airport Authority, which operates Bradley International Airport, and Sportech Venues, which operates the state’s off-track-betting facilities, including Bradley Teletheater, near the airport, remain in the running as does Hartford, whose original proposal did not specify a particular site.

MMCT Venture said Monday it also received an application from Plymouth, but is not considering it because Plymouth falls outside the geographic scope of the tribes’ request for proposals. Plymouth is located in southeastern Litchfield County.

The tribes, who said they have begun evaluating the latest submissions, have indicated they will release the proposals of the "finalists" in the process. They did not say how many finalists there will be.

b.hallenbeck@theday.com