WWE gave an update on Seth Rollins’ knee injury on Raw, but it did not reveal anything that we (the people who read stuff on the internet) didn’t already know.
After a rundown of Samoa Joe’s attack on Rollins, Michael Cole simply said, “Because of Joe’s attack, Seth Rollins tore his MCL in his knee. His participation in WrestleMania is in serious doubt.”
Cole did not say that Rollins was 100% going to miss WrestleMania, so that could indicate that the initial timeline of around eight weeks (right around WrestleMania time) is accurate and there is still a very small chance Rollins would be able to compete. It could also just mean that WWE doesn’t yet know how long Rollins will be out.
Rollins was in Birmingham, AL yesterday getting his knee checked out by Dr. James Andrews, who has performed surgeries on many WWE wrestlers. There has been no information yet on whether or not Rollins has actually undergone surgery, though.