Out of the above list i would have to say G n' R and Pink Floyd. When i say GNR i mean with Axl, Slash, Duff, Izzy and Steven Adler. That would get me to pony up money for Guns again. I think we are more likely to see a Beatles reunion with the re-animated corpses of Lennon and Harrison than a honest GNR reunion, and that's sad because none of them are as good as they were when they were GNR.
Pink Floyd is a band that i would love to see reunite, but that was not going to happen when Rick Wright was alive and now it will never happen. Gilmour knows that a reunion would water down Floyd's legacy and he still has issues with Waters and now with Wright's death, Gilmour is even less inclined to get back together.
I know there are not a lot of Hip Hop/Rap fans here, but i got to represent. I would love to see Boogie Down Productions, Digital Underground and N.W.A get back together.
"Here you leave Today and enter the world of Yesterday, Tomorrow and Bankruptcy!"
Maybe for once, someone will call me "Sir" without saying, "You're making a scene!"
Can't say that there's anyone on that list I'd want to see back together. They all had their moments, and trying to reprise those moments never goes as well as we the fans would want. Leave the legacies where they belong and move forward.
Now, if you start up that rock heaven thread, I have plenty of people I'd love to see who were taken too soon while still in the midst of their moment.