According to Wikipedia's explanation of the rules, up to three teams can make 6 primetime appearances, and the limit for remaining teams is 5. Currently Baltimore is scheduled for 5 PT games so if correct they would still be elegible for getting flexed in week 17. But your point still stands, if the NFL has it's eye on a week 17 BAL game, it might make them more likely to flex out BAL before then. However I don't think you can rule out a potential week 17 game where DET is playing for a playoff bid and GB is playing for 16-0. For the record I counted up the big ones in terms of scheduled PT appearances, it looks like this. There may be some other 4's, not sure. The ? on DAL and GB is if the Thanksgiving games count since they were national games (despite not actually being in prime time).NO - 5PIT - 5DAL - 5 (6?)NYJ - 5PHI - 5GB - 4 (5?)ATL - 4NYG - 4CHI - 4