I think way too many people underestimate the fact that Weidman is far more cautious and competent than Silva's previous opponents. He has that balance between aggression and foolhardiness. He is going to pick his shots, keep it technical and crisp and score some takedowns, where he is going to score his damage. I think that Silva relies WAY too much on counter-striking opportunities, which Weidman will not give him. He is going to be afraid of the takedown, so Weidman is going to be a lot more capable of shifting levels and dictating the pace.
I think at 39, we all need to recognize Anderson is old. Sorry, the dude destroyed the world for years, but Weidman is a super technical, young beast. Changing of the guard. I wouldn't be surprised if it's a real long time before someone surpasses Silva's mark of 10 defenses.
205: Evans, Jones, Gustafsson (165+)
185: Weidman, Machida
170: GSP, Condit
145: Edgar, Mendes
135: MacDonald, Barao, Faber
125: McCall, Dodson