Shinya Aoki's appearance in DREAM's Welterweight Grand Prix worked out about as well as an elephant on a diving board. He was able to take Hayato "Mach" Sakurai down, but everything after that went poorly. Sakurai quickly reversed from the bottom, knee'd him in the head four times, then knocked him out with some vicious right hands.
WAMMA will surely play this off as no big deal since Aoki was fighting in a higher weight class. They'll point out that BJ Penn lost against a Welterweight too. The problem with that line of thinking is BJ Penn lost to one of the best fighters alive, while Aoki got smoked by someone who isn't. If you're going to throw around titles like "#1 Lightweight in the World", you better be sure the guy wearing the belt deserves it. Aoki is a great fighter, but his resume was a little thin to be handing him such a distinction.
Knowing WAMMA, they'll probably overnight a Welterweight Belt to Sakurai.