7. Rhyno
Rhyno's arrival in NXT has been met with an overwhelmingly positive response, and it's been a lot of fun to see him once again delivering the Gore. His role down in Orlando probably isn't leading to him making a full-time main roster return, but that doesn't mean seeing him make a surprise appearance on Raw one week wouldn't still be incredibly exciting. Him beating Cena and the two embarking on a feud isn't quite as appealing, but there would no doubt be a pretty interesting story which could be told between the two. Ultimately, just a one off match might be for the best, as Rhyno's return generate a huge pop and just make for an entertaining match on a Monday night. He's currently being utilised really well in NXT though, so this probably isn't a priority for the WWE right now. If they want to shake things up and surprise fans though, this would be the way to do it.