I think that would be... very odd. Kefla was and is immensely popular, and was a HUGE fight in the show. But if it means we get Roshi, I'm all for losing Kefla. He seems like he'd be a much more crafty, fun fighter.
...On the other hand, losing out on a potential female character for a known pervert and sexual harasser, um, he he. He heee.
Maybe Roshi can back her up, since that seems to be ASW's bread and butter. (lol)
Biggest knock against him imo is that he still can't fly. We'll see.