#4 To showcase that Seth Rollins has a fighting chance
Drew McIntyre beat Brock Lesnar at WrestleMania clean. Imagine how rare a feat that is, and if you couple the fact that it was him that ended Brock Lesnar's dominant streak in the Royal Rumble, you will probably come to the conclusion that there is no way that Seth Rollins will become the WWE Champion at Money in the Bank.
Top name doesn't want to enter the WWE Hall of Fame. More details HERE.
I mean, with all due respect to Seth Rollins, he's had his moment in the sun and now, it's Drew McIntyre's chance to shine bright. He can potentially feud with the likes of AJ Styles, Randy Orton, and Bobby Lashley on RAW, even if you discount Zelina Vega's faction and Jinder Mahal who came back with a lot of steam.
But with Murphy thrown into the mix, the audience member sitting at home will have an element of doubt in his/her mind about the outcome of the upcoming contest. He/she may not necessarily know if the odds have titled in Rollins' favor with the arrival of his disciple.