FWIW, this wouldn't be just for my own amusement. We'd be bringing a few things with us that I think a world with 5 or more openings in one league needs. 1. Stability. You'd be signing up for two real life years. 2. An injection of enthusiasm. 5-6 owners coming in to turnover rosters should bring some activity. 3. Quality ownership. You're expected to win games after rolling the roster.
So, with that in mind, I'd be looking for owners who have a track record of sticking around. A guy with 20 seasons in one world would be far more acceptable than a guy with 2 seasons in 10 worlds. An owner with a winning track record would be preferred to one who hasn't won. That said, I doubt I'd dismiss anyone without consideration.