How the hell can a group that was only a big deal for about a year have a "comeback"?
The groups that could have a comeback are the ones that made music that people still listen to like the Beatles (obviously they couldn't do it), Led Zep, Pink Floyd, etc. The Spice Girls were a gimmick, nothing more.
" The Spice Girls were a gimmick, nothing more "
Tell us what you think, what you really, really think. ;o)