#3 Winner of the Shield Triple Threat at Battleground
All three members of the Shield have had their brushings with the Beast; Reigns at Wrestlemania 31, Rollins at Royal Rumble and Dean Ambrose at Wrestlemania 32. And to be honest, the WWE could choose to have any one of them face Lesnar again and accordingly manipulate the concerned storyline.
Especially if Lesnar wins at UFC 200, placing him in the WWE Title picture would be a prudent course of action as he would have done his reputation as a legitimate bada** no harm at all.
A top AEW star just called one of his colleagues 'spoiled' and 'narcissistic' HERE.
And after Battleground, if there is a clean victory for one of the three former brethren of the Shield, a match against Brock Lesnar would merely be an eventuality.