While proper 2k8 NFL season mode isn't possible yet on PS3 it's not a total disaster as we can still of course simulate and roleplay the NFL playoffs within 2k8 quick game mode, letting our created NFL teams play against themselves, recording the results and stats outside the game on paper (or phone, tablet etc) to see who would've won the conferences in real season mode all the way up to the Super Bowl! For any game in the 2014-15 season, just select the created NFL team with two controllers, go back to controller select and set it to play broadcast spectator mode cpu-vs-cpu (or just sim it to the end). Record the results, rinse, repeat.
When I finish tweaking my NFL2K15 teams I'll upload my PS3 NFL season files (i.e. my user created rosters) for anyone interested.