That's my guess. We have just one more AOS until it comes out and in the preview they said there would be a scene featured from AoU. At first I thought they meant like a long preview of the movie, but I think it's going to be in the actual episode. Like we get a scene of Coulson and crew flying in and kicking major ass and then it cuts to the scene from AoU so it's like they are fighting together. It's possible that if some of the cast from AOS are in AoU then it would be around the time the Avengers hit the Hydra base.the avengers age of ultron starts out with an avengers attack on Hydra to get
Loki's scepter. this is where AOS comes in i guess
lol
). Pity about the timing for the tie-in, but I'm hardly about to make myself wait.