#2 Former Universal Champion Brock Lesnar
The Beast Incarnate has not been seen in WWE since his absolute destruction of authority figure Adam Pearce. For whatever reason, Pearce has revealed himself to be a villain.
The company has already hinted at a Lesnar return through an interview with Paul Heyman. Interviewer Kayla Braxton noted that rumors suggested the former WWE Universal Champion's suspension has been lifted.
Lesnar can return and move back to his usual place at the top of the card, challenging Roman Reigns for the Universal Championship and creating general trouble for Paul Heyman.
#1 Former WWE Champion Drew McIntyre
Ever since Drew McIntyre was drafted to SmackDown, a feud between him and the Universal Champion has been seen as inevitable. If the company doesn't decide to save the rivalry for WrestleMania season, this is the right time to pull the trigger.
Reigns has been champion for an extended period and a match-up against one of the company's most dominant full-time stars will be a great challenge to his Championship run. The reign must end at some point, and there's no one more credible than the Scottish Terminator to end the rule of Roman Reigns.
Reigns and McIntyre are no strangers to each other and their previous match-ups displayed in-ring work of outstanding quality. Fans may expect some severe and physical battles between the duo.