Beane has never "folded" in a contract deal - other than maybe the Von contract, but he was an FA. Beane has an expectation here - you get to play on a great team, with a top 3 QB in the league, and we are a TEAM trying to win the Super Bowl
If Cook wants 15M+, I just dont see it happening. Beane I think will expect him to play when it's time to suit up, and he will continue to offer him 12-13.5 until Cook either blinks or walks