#2 To justify the Super Showdown event in Saudi Arabia

It's been made quite clear that Brock Lesnar will be part of the Super Showdown show in Saudi Arabia. While it's unclear at this time who Brock Lesnar will be facing, he might be able to cash in his Money In The Bank briefcase at the event.
Will he be facing Seth Rollins for the WWE Universal Championship? Will he take on Kofi Kingston for the WWE Championship? The WWE Universe will be finding it out soon enough.
Female superstar says she inspired John Cena turning heel HERE
#1 Brock Lesnar is an extension of Vince McMahon

Vince McMahon is pretty much solidifying his hold on the WWE by putting Brock Lesnar again in the championship picture. The Beast Incarnate is an extension of him with Paul Heyman acting as his mouthpiece. Don't be surprised if you see Paul Heyman doing a promo that sounds a lot like Mr. McMahon on this week's Raw.