#3 Seth Rollins

Of the three choices discussed, Seth Rollins is the most likely to get a date with The Beast, and destiny, at WrestleMania 35.
Lest it is forgotten, Rollins has already won a world championship from Brock Lesnar in the main event of a WrestleMania; memorably cashing in his Money in the Bank contract to win the WWE World Heavyweight Championship at WrestleMania 31.
The last time these two faced off, the match was a disappointment. But unlike WWE Battleground 2015, Rollins is not the snivelling, weak, incompetent, heel champion, but a righteous babyface that the fans are firmly behind.
The entire dynamic would be different this time around; Lesnar the unstoppable heel champion who doesn't care enough to show up, and Rollins the fiery babyface who entertains the fans every single night.
Moreover, Rollins has been subtly positioned to face Lesnar; he has already called him out in promos a few times.
All that is left is for him to defeat Lesnar in the main event of WrestleMania 35, and burn it down.