Would be a great fight from a fans standpoint. It's always fun to watch big names go at it, but as somebody else said earlier it's not what the UFC wants. Chuck has 1 fight left on his contract and if/when Dana let's him back in the Octagon it'll be against somebody he can easily beat. Nobody wants to see an icon go out in a free fall. It's bad enough that Liddell has lost 4 of his last 5 fights...but to end his contract and possibly his career on 3 straight losses would be devistating.
As far as Griffin goes, his next fight will probably be a guy in the 8-9 range of the top 10 LHWs. Personally I'd love to see him fight Jon Jones but I may be alone on that. It will probably be 1-2 more fights before Jones gets a legit shot at a top contender.