This sounds interesting. Did you ever considered adding the scenes from episodes 19 and 20 in season 2 of Agents of Shield that setup the movie? There is the raid on the Hydra base, where Coulson learns of Strucker`s base and contacts Maria Hill and maybe Theta Protocol?
No, because I never really got into Agents of Shield more than few episodes. I think it would just confuse only movies- watchers seeing Coulson alive. The only major plot hole imo is that the Loki’s scepter is in Hydra’s base in the beginning of the movie, but A: Endgame gave us an answer to that. =)