>>713791772
>>713792159
The main game is 20 missions and 28 planes, the DLC is 3 missions and 19 planes
The DLC missions are incredibly good to the point of being some of the best in the entire series, and the DLC planes range from broken to just fine
I'd recommend the Season Pass for the missions and 3 of the superplanes because they're fun and help with the missions (they're endgame content despite chronologically taking place in the third quarter), but the rest of the planes/packs are there pretty much only if you like those planes in particular or are a completionist kind of guy