I knew the Stone Roses would reunite when the time was right. Mani told me once that they were all pretty much in, it was really just about timing and money being right and Ian Brown crumbling, which Mani said he knew he would.
I would say the 2 most unlikely reunions we'll ever see are the Smiths and Husker Du. Too much bad blood and too many egos. And the more that time passes on, the less likely it'll happen. Morrissey doesn't care if Mike Joyce and Andy Rourke need the money. Bob Mould doesn't need the cash. He could have reformed Sugar and been rewarded handsomely well there, and in the end he didn't even do that.
The Smiths would be the grandaddy of all reunions for sure, but at this point I don't even know why anyone bothers speculating anymore. The Jam is also never going to happen.
The band I think I'd want to see most right now is the Red House Painters. And Catherine Wheel.