Considering its supposed to be the narratives culmination,going on another snatcher adventure would be kinda pointless.
Also the intro sounded like Korra´s failure was a recent event,meaning the MC was already around...so crazy idea,how about just possessing his own body?
Though,considering the timeframes between Avatar and Korra Im not exactly sure what the endgame is supposed to be.
Makes a harem ending kinda...hard?
Just hoping its not going to be Asami,obvious misjudgement of your consumer base aside(far from everyone is into gender bending or futa),using what was the last nail in the coffin of Korra´s narrative would be such a shit hook.