I think its gonna be hendo thats moving up slightly in weight to 220...
I dont think anyone can count either guy out, while this matchup does look like its designed too see a guy like hendo get knocked out silly and just to see Fedors hands raised you cant count out the h bomb, it was hendo who asked for this fight also...
Hendo showed us he had some good experience in his last fight, stopping the take downs and being very coy off his back, striking as always and h bomb follow up even showed some decent grappling and good work in all areas, so should be a great match.
It's a 220lb catchweight so Hendo will probably weigh his usual 205, don't see him bothering to put on mass just for this fight it would slow him down too much.
I think it's more for Fedor to get into decent shape, and then hopefully continue down to 205 after the fight.