Nefaria.
BM was playing "Odd Couple" with the Watcher for too long.
He needs to hit the gym, get a haircut, lose that belly (evidently his wife, the Watcher, is a good cook) and do a few publicity adventures with clowns like Hulk, Wolverine or Sentry. Maybe a buddy-story with Thanos.
That way, he can start building some street cred.