Could the Klein resignation be the harbinger of a new contract? I'm not sure, but it just may be.
Klein would not want to be the one to give in to any of the union's demands. Signing a new contract with Cathie Black at the helm would give her a leg up and allow Klein to slink away like the slug he is. It would also give Mayor4Life a way of justifying a pay hike because he needs to usher in a new era of (fake, of course) cooperation with teachers.
Speaking of that, it may just be that with Klein gone, the release of the TDRs may be a moot point. Ms. Black can swoop in, put the kibosh on that idea, and become an instant hero with the union and Mulgrew.
Of course, if she releases the data and holds the line on the contract, we'll know we got a new Klein in a Black sheep's clothing.