This is virtually trolling, this fight would be a joke.
Cung Le has a good record, but Shamrock and Smith are the only even slightly notable guys he has fought, and Shamrock was at the tail end of his career when Le fought him. Smith has a good chin and lots of heart, but skillwise he is a 3rd rate fighter, and Le lost to him once. Le has little to no ground game either, so assuming Silva didn't feel like bruising his knuckles by knocking Le out, he could just submit him easily.
Silva might as well fight Matt Serra as fight Cung Le.