Personally, I wouldn't care if I ever saw Mike or Otunga again.
Mason Ryan should NOT become a bodyguard for Del Rio (did big things for Brodus Clay, right?). The Miz would be a bit more interesting, but as someone said Miz just dumped Riley so it would be a step backwards for both of them. I'd love to see Ryan get used, but I honestly don't have any ideas for him right now.
And Nexus just needs to disband, it's embaressing now. Ryder joining wouldn't do him any favors either, he'd just be going down with a sinking ship.