WWE is underway with the WrestleMania 40 season and they've also started dealing with headaches with injury bugs biting the bonafide main-eventer of the company in Seth Rollins who might end up having an uncertain set of future weeks.
In the main event of the latest episode of Monday Night Raw, Seth Rollins defeated Jinder Mahal (who was accompanied by Veer and Sanga of Indus Sher) to retain the World Heavyweight Championship.

Soon after the match was over, PWTorch reported that Rollins hurt his left leg in the late part of the match. He was helped toward walking backstage before eventually putting weight on it, slightly.
In an update from the same source, there are people backstage in the WWE who have information about Seth's injury but they aren't commenting on his status, meaning it's either bad news or WWE is trying to get a storyline out of this.
"I've asked a bunch of people and some of whom would likely be privy to what's going on who won't comment. I understand there's internal policies on that. But I would think if he was fine and he 'walked it off' [then] we'd be hearing that."
Seth Rollins' injury would be the last thing that WWE would be hoping for at this time because they don't want to lose a regular marquee name on the Road to WrestleMania which will force the company to alternate the set plans.
Meanwhile, the updates provided via recent reports suggest that the reigning world champion will not be participating in this weekend's house show events and Randy Orton will step in as his replacement.
In further updates, it was assumed that WWE could still be waiting to get reports from Seth Rollins' actual knee condition. A detailed check-up could be undergone on this coming episode of Raw which should bring more updates around him.
If the ongoing storyline is any indication then WWE has CM Punk vs. Seth Rollins scheduled for WrestleMania 40. It's also safe to assume that this match will go down for the World Championship given the latter is still carrying the belt.