@JaneJeon I thought of that. I'm personally rooting for the "Disney princess" ending.
But let's be realistic here, at this point they've been swapped longer than they were in the original bodies, and it was during a far more important time of their life. It'd be REALLY hard to drop in and reclaim that life now, they would lose the life they've built in the interim, and handwaving the issue away would feel cheap. (Yes, I'm the jerk that sees an ugly darkness in Back to the Future's "happy" ending.)
Admittedly, being a couple would smooth some of those wrinkles. Together they wouldn't have to stumble through being complete strangers around their friends and families, they'd have someone to guide them through the surprises their new bodies have for them, et cetera.
But I think it's all going to end in tears. And it's going to hurt when it does.