I wish him the best, but I don't think Ngannou is half as big as he thinks he is. He doesn't really have hardcore following as guys from PRIDE, and don't really think he went mainstream either.
Personally, I think he would have mopped the floor with Jon Jones and sent his head to a shadow realm and think Jones knew this and not a coincidence he was away for so long and came back literally right after Ngannou left. So, I'd think that means I believe he is the best HW in the world.
But, there is not a single attractive match up for Ngannou outside UFC. Maybe just one, Bader at Bellator, and even then, it's Meh. I think Bader at HW is very good though.
So, even though I'm curious where he goes, and wish him the best, and it sounds like PFL is the only mma org he is linked with, and he can't really box lol, I gotta say
Good luck to him though, not sure where he goes I guess. I thought he made a mistake when he left, and it's not been looking good, but hopefully he does well. I think he goes where the most money is.