(to explain myself)
Before the reunion could happen, Axl needs to put out Chinese Democracy first.
If the album is a success, then Axl has proven that he can do it on his own, and therefore he will have no problem with playing with the guys "he doesn't need". If the album flops (not likely, it will sell millions because of all the hype alone), Axl's gonna realize that he needs the classic lineup. So whatever happens, there will be a GN'R reunion. I just hope they don't take too long 'cause they're getting older.
Black Sabbath, Kiss, Anthrax, Aerosmith and many more have done it. So will GN'R. Just release the goddamn album so the reunion can happen!