#2 Asuka turns heel

If Carmella does win the Royal Rumble and go on to challenge Asuka at WrestleMania, it will be likely that a heel turn is in Asuka’s future.
Carmella had an extended run as a heel already and is probably the most over she has ever been in her still new face character that developed over the course of her partnership with R-Truth. It would be a mistake to turn her heel again at this juncture, but Asuka working a more heelish, ruthless, and cheating style could breathe new life into her character.
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Given the Empress has struggled to recapture the magic of her NXT run on the main roster, a change like that could be in the best interests of everyone involved, whether it happens in the build too, at, or after WrestleMania itself. Asuka’s heel turn could be a means for her to retain her title, or justification and means for her to chase the title after she drops it.