#4. Roman Reigns vs Drew McIntyre

The second interbrand match on this list, SmackDown Live's Roman Reigns will take on RAW's Drew McIntyre in a grudge match. It's not been an easy period for The Big Dog.
While he hasn't gone out of his way to challenge for the Universal Championship (despite having a clear claim to it), he has seemingly given up his pursuit for that title so that Seth Rollins can tear it up on RAW.
Top WWE star punished? More details HERE
Reigns has been in the middle of a rivalry with SmackDown commissioner Shane McMahon. The Prodigal Son has been a tyrant and a thorn in Reigns' side, even defeating him at Saudi Arabia (albeit with help from McIntyre).
While Reigns will obviously look to get revenge on Shane McMahon, he's going to have to go through Drew McIntyre first. And if McIntyre is around, so will Shane and potentially even The Revival and Elias.