#3 Drew McIntyre
Drew McIntyre has been out injured ever since his match against Andrade 'Cien' Almas back at NXT Takeover: War Games. The Scottish star was someone who was rumored to be heading up to the main roster before his injury, so it makes sense for WWE to follow through on this plan if he is cleared to return in the near future.
The roster will be lacking Brock Lesnar after WrestleMania and will look a little different following the WWE draft so they will need someone who is able to step into some huge shoes and McIntyre has already proved that he has what it takes to fill the void, since he was able to dominate the NXT roster when he was NXT Champion.