I doubt it will happen anytime soon. Anderson Silva went to the hospital after the five rounds of pounding, so he will need some time to recover. Besides, if you know the UFC, you will be pretty sure that Silva's next defense is atleast five months away.
First in line appears to be Vitor Belfort. Then Sonnen or Okami.
It could also be a rematch between Silva and Sonnen, following TUF 744.433.535. Then Belfort, then Okami.
GSP will fight Koscheck first AFTER TUF,(and if he wins) then Kampmann/Shields/Fitch.
So GSP vs Silva is pretty far away.
Fun trivia: In danish "kamp" means "match" or "fight". So Martin Kampmann really lives up to his name.