We've got quite a list of Cruiser champs turned heavy.

Haye
Adamek
Gomez
and now Mormeck

Gotta wait to see how he looks, but he certainly could do well against the smaller heavyweights if he's still able to keep his conditioning. I would love to see a Haye/Mormeck rematch at heavy, the first one at cruiser was Haye's most exciting fight IMO.