You might not think it, but it won't be an easy task to replace Wes. He might not shred all over the fretboard, or do amazing solos, but he definitely has a unique style of playing.(not to mention that he is responsable for most of the ideas for the music)

If Limp Bizkit will stay succesful all depends on the new guitarplayer I think, so, can't really say anything about that yet.