It will definitely be interesting to see what kind of offense he implements. I'm not sure that he has ever really implemented an entire offense that is his own. In Dallas he took over under Garrett who was an OC/QB, he only had one year with the Chargers, and a lot of what Philly did was still Sirianni and their power run game.
It's possible that one year with the Chargers was the closest we have seen to what he wants to do and that was more of a passing attack. But, that could have been based on the personnel he had.
Based on the interviews that he gave Super Bowl week, it sounds like he likes to throw the ball (as a former QB), but he will want an effective run game to keep teams honest. And, it sounds like his offense will use West Coast terminology, and maybe have a West Coast base with lots of motion added, but draw from lots of different offenses to suit personnel and stay unpredictable. It honestly sounds kind of like the things Sean Payton did/does, but it will be interesting to see.