Who can stop Anderson Silva?

As far as Anderson Silva goes we've seen him weak on his back. He lost to Chonan in Pride with a scissor kick takedown and leg lock.
I would like to see Dana White bring Dennis Kang to the UFC to take on Anderson Silva.

IF Pedor does come to the UFC the only person with a shot at him might be Arlovski. Even though Matt Lindland almost knocked him out recently.

The UFC needs Paul Beuntello back fighting in the heavyweight division.

Gomi vs Penn rematch or Gomi vs Diaz rematch?