#4 Braun Strowman
Earlier, I mentioned the possibility that Joe would be tossed into the Andre the Giant Memorial Battle Royal as a means to just give him something to do where he can look like the biggest star in the match. Even more so, I think that spot is going to be given to Braun Strowman, who has a much stronger reason to be booked in that scenario as he's been perpetually asking for competition and has even recently taken to wrestling multiple people at the same time.
However, that got me thinking about Strowman's propensity for arguing with authority members. What if, in his struggles to find true competition, he and Samoa Joe cross paths? What if Strowman sees the destruction Joe is putting out there and sees it as a threat to his calling?
The rumor mill has placed Strowman all over the board with WrestleMania for the past few months, going from being The Undertaker's opponent to winning the Royal Rumble in order to challenge Roman Reigns for the Universal Championship and everywhere in between. None of that seems to be panning out for him, but maybe the reason was that he is waiting to start a feud with Joe that would have come about after the Joe vs. Rollins match at Fastlane?
WWE knows the situation they're in with Roman Reigns not being as popular as they had hoped, which is why he was the 30th entrant in the Royal Rumble. They knew he would be booed and they wanted Randy Orton to be cheered, so they figured if they put him on last, it would accomplish the goal.
By that rationality, placing him against Braun Strowman at Fastlane means they know a guy like Strowman—big, consistently improving, fun to watch—will probably get a decent amount of cheers against Reigns. This could be a shift in the momentum that makes him start working on more of a tweener side rather than full-on heel.
He's already had some humorously antagonistic exchanges with heels in the past like Kevin Owens and Chris Jericho and those segments went over well and proved that he isn't the same type of cowardly bad guy who only fights babyfaces like many others on the roster.
Perhaps Samoa Joe was brought onto the Raw roster in order to be the heel replacement for a more babyface Braun Strowman with the two big men clashing in an undercard match at WrestleMania, where one of them would have to suffer their first true taste of humility since coming to the red brand.
The match itself doesn't seem incredibly likely, but given how neither man has a set path in front of him at the moment and they're both on the same roster, WWE wouldn't have to bend over backwards for it to take place.
Sure, it's a bit of a stretch, but we're talking about WWE here. Last year, they had The Undertaker fighting Shane McMahon in a Hell in a Cell match where if Shane lost, he'd be tossed aside and instead, he was rewarded for his efforts and given control of an entire show. It doesn't have to make perfect sense in order to happen.