According to a report from the Wrestling Observer Newsletter, one of the main reasons Drew McIntyre eliminated Brock Lesnar and won the Royal Rumble is because Vince McMahon wants to have the strongest WrestleMania main event possible.
Both Heyman and McMahon want the Lesnar vs. McIntyre match to be pushed as strong as possible, even more so than the rumored Roman Reigns vs. Bray Wyatt match. Unless there is an “outside attraction” match, Lesnar and McIntyre will main event the show.
The original plans had Roman Reigns winning the Royal Rumble match but McIntyre would still have been the one to eliminate Lesnar. The idea behind the original plan is that McIntyre wouldn’t need to win since he knocked out Lesnar, and the Rumble would set up both title matches.
Once McMahon decided that Lesnar vs. McIntyre would be the WrestleMania main event, it was decided to make McIntyre look as strong as possible by eliminating Brock and winning the Rumble.
