Semmy-Overeem would be a good fight, if they fought under K-1 rules. Semmy isn't an MMA fighter so i don't see much of point in that fight.
Why do people say that ? He had his first pro mma fight before his first pro kickboxing fight according to wiki
"I tried to punch him, and he literally moved his head out of the way and looked at me like I was stupid for doing It"
- Forest Griffin
NPFFL: Alistair Overeem, Fedor Emelianenko, Shane Carwin, Chris Leben