If they expand the season (which would be stupid beyond belief) the NFL would need to implement a DL system like baseball. Season ending IR sucks, especially if a player could come back. They can still have season ending IR, but they should also adopt a 4 game DL and an 8 game DL, so if a guy is hurt for a month or 2, you can bring up a warm body, but aren't penalized by forcing him to sit out a year.