#2. Roman Reigns
This one is a rather tricky but uncertain situation. Roman Reigns, when promoting Hobbs & Shaw first stated that he only has two more years as an active wrestler before moving into Hollywood. Perhaps The Rock may help him there.
Later on, he said that 5 years is a possibility. But given what happened to him, 5 years seems to be a bit of a stretch at a full-time level. Given his star power, Reigns will always have the option of becoming a part-timer and he knows that his days in the ring aren't as long as he would have hoped. He has already planned an eventual transition into Hollywood once he's done.
Again, all of this is health permitted. Roman Reigns has inspired many with his incredibly quick return from leukemia and since then, has been doing a fantastic job in his role. Whether or not he gets pushed to the top again, we may never see him main event WrestleMania consecutively the way he has.
If his time is going to be very short, which we believe it will be, then we should appreciate every moment that he's on the screen. Fans have been much more welcoming to him and he has been great upon his return. Hopefully, it continues this way.