If he gets the right opponent I suppose it would be viable. I suspect it would also require a solid support bout or two.
No. Look back at his record. You can count the number of exciting fights he has had on one hand and he doesn't possess elite level skill. So in my book, never a PPV fighter. As mentioned above though, Sky would put him on PPV easily.
Yesterday's fight was only the 3rd exciting fight I can recall from Bellew, obviously Cleverly and McKenzie first fights.
He's got some good fights ahead of him, either unification, mandatory or voluntary. Cruiserweight is stacked at the moment so many excellent fights that could be made.