I know there are quite a few MMA lovers in here, most of them would probably know who Mirko "Cro Cop" Filipovic is.
In my opinion, he may be an awsome K-1 fighter - but that's just it. Being at the level of a blue belt in BJJ, i don't see him well rounded enough to take the belt ever in Pride. Especially considering the primary competition is Fedor Emelianenko - whom in final conflict, you saw destroy Mirko.
If you look at his fighting statistics at http://www.sherdog.com/fightfinder/fightfinder.asp?fighterID=2326
you'll notice he has never beaten a top 5 MMA fighter. I don't deny his skill in striking, but he is just not well rounded enough to take the belt.