it was hard to make out the first time I watched it, but the fourth guy does step out of frame come back in the frame, and then the guy in the mask also walks up right next to him so it does appear to be five people.
So my top guess now is probably gonna be David Finley and the war dogs and if not, then it’s gonna be an Adam Cole KOR Roderick Strong and the kingdom. If they stretch it out long enough for Adam to be back from his ankle injury Kyle would probably be ready to be back by that point if he’s going to be able to come back at all and if he’s not then they could always bring another member of the bullet club into the new kingdom. Someone that wants to feud with Jay white.