Everybody wins

Here’s something for discussion.   Pick someone to send from WWE to TNA and one to go from TNA to WWE and the move is the best for both companies and the wrestler’s career.
Matt Morgan – Sticks out like a sore thumb in TNA, and they wouldn’t have to try and throw him into random tag teams to justify his spot.  WWE screwed up with him the first time, but the stuttering thing is ancient history. 
Evan Bourne – WWE doesn’t care about any of the strengths Bourne has.  In TNA he is tailor made for the X-Division and has a ton of friends in the company.  I could see him with a tag run and maybe some world title shots.

Well, Morgan is already happening, so get ready now.  They're just waiting for the lawsuit thing to blow over, basically, but he was pretty much going to debut a few weeks ago and now can't thanks to Ric Flair.  My alternate pick would be AJ Styles (although it would realistically never happen) because they can instantly plunk him into feuds with D-Bry or Punk and he'd be totally fine there.  I think Bully Ray could have another singles run in WWE with this character, too.
Going the other way, Tyson Kidd is the obvious choice for me, but he's basically living his dream right now and I wouldn't want to take that away from him.  The Miz would be a great choice, because he could bring media cred their way and could work the big main event style they need.  Ditto John Morrison.  I think Ziggler and Swagger would fit well there too.  Especially if Swagger joined up with Angle as his All-American stooge.