This can be an awesome thing for an end of year tournament tradition. Have one block have their matches on Dynamite, the other Collison. Give it a 15 or 20 min time-limit on TV for each so that you have less than a half the show (since I doubt all matches will go max time-limit). Then you can hopefully have time for the other storylines. Then the tournament itself can be an accolade all on its own, or lead to a title match at Revolution or something. As for who to win, frankly there's not one which comes to mind as a "must" of the reasonable winners (Top stars or people who are capable of making that leap).
Just please don't be as injury cursed as Stardom's Five Star GP was.