No way can Wanderlei beat Chuck if Chuck can KO Renato in a minute. So what Quinton beat Chuck that was 3 years ago and Chuck lost to Randy bad around that time too then beat him twice in a row!
If Wanderlei faught Renato it would go to a decision and be a boring match and Wanderlei would win. It would be a repeat of watching Wanderlei fight Ricardo Arona in their first fight.
My point is Chuck would beat Wanderlei. But I think Chuck wouldn't have his way with Mo Rua. That would be a less predictable fight IMO since Rua is unstoppable.