Board Thread:Policies/@comment-1009000-20140116142410/@comment-1009000-20140214130312

we make funny distinctions when it comes to "real names". the Invisible Woman's legal name is Susan Richards, her "real name", as far as we handle it, is still Susan Storm.

As for Cage, I would assume that in-universe, a lot of people would still refer to him as Power Man, and I haven't seen him tell anyone off about it or deny it. It's true he doesn't use it anymore actively...