User blog comment:LuffyPirateKing/The View From The Afternoon/@comment-1327392-20120108031633

In terms of actual strength, I think only Smoker is strong enough to become an admiral. Of course, since he isn't a lapdog and follows his own path (LIKE A BOSS), he probably won't have made it that far up the food chain. At most he'll probably be a rear admiral or a vice admiral when we see him next.

Of those who are ranked though, I do think Tsuru or either Doberman or Onigumo are the most likely candidates. Tsuru has the seniority and Doberman and Onigumo are super hardcore like Akainu, so I get the impression he would've promoted them over someone more reasonable like Momonga.