#4 The Good Brothers (Karl Anderson and Luke Gallows)
When The Good Brothers came to WWE, there was a lot of excitement that with AJ Styles, Finn Balor that a version of The Bullet Club would exist in the WWE. Sadly, that didn't seem to happen. Luke Gallows and Karl Anderson have been on and off WWE TV.
Again, with the NJPW connection, it's quite obvious that they would follow some of their NJPW brethren to AEW. It was reported a little while ago that they turned down new 5 year WWE contracts. They were a powerful tag team and were over in NJPW.
While it's not a shoo-in that they'll end up in AEW, the writing seems to be on the wall that AEW will make a play for them. Throw in old friendships and the promise of main-eventing PPVs with The Young Bucks, it gives more reason to sign with AEW.