Seems unlikely. Rudin is done for the foreseeable future, and it's pretty unusual for people to hand over producing responsibilities to other producers. The only reason it happened with Mockingbird/Music Man/WSS, etc. is because these productions were already well under way: they had investors, they had audiences expecting them to return. Or, in the case of Music Man: it was a highly anticipated show with a lot of visibility and expectations from the general public, and again, from investors.
With something like Our Town, whoever would produce it (assuming it wouldn't be Rudin) would basically be starting from the ground up. Maybe Dustin Hoffman is dead-set on doing it, and will seek out other producers to see it through, but somehow I don't get the sense that this is the case. And hey, maybe Rudin will release the rights, and some other producer will decide they want to produce a revival of Our Town. But that requires some active decision-making from some unknown party - it could definitely happen, but it's just as likely as any other classic play getting a revival in the near future. So it's anybody's guess.