1. The Avengers left behind after "the snap" (Iron Man, Captain America, Black Widow, War Machine, Hulk, Rocket Raccoon, Ant-Man, Thor) are done mourning and preparing for an attack on Thanos.
2. We STILL haven't seen Captain Marvel. The tension is killing us, is she in or not?
3. Captain America is pissed...like really pissed! We see Cap looking grim-faced as his voiceover "Some people move on, but not us". Chills anybody?
The Super-bowl trailer smartly hasn't let us in on any really new information about Endgame. If anything, it has ramped up the anticipation.