Impossibilium said:
You're partially right about Agents of S.H.I.E.L.D. explaining it. The episode before the movie came out had Coulson discovering the location of Loki's sceptre and Strucker, then passing the info on to Maria Hill. I would assume she or Tony gathered the Avengers together between that and the movie. They probably didn't show the get-together scene so they could jump into the action immediately.
Although . . . now that I think about it, neither the show nor any of the other movies make mention of the team hanging out together on a regular basis, like Age of Ultron implies. Maybe they've been hanging out at Avengers Tower together this whole time? Seems weird, and probably should've been addressed in Winter Soldier at the very least.[/quote]
My issue with Agents of Shield having the necessary set up information is that it is the spinoff show. It worked best when you see the aftermath of Winter Soldier and the fallout of SHIELD, essentially filling in information about what the multinational information agency was doing after it got taken over, but doesn't work well when it takes expository infromation away from the movie. Looking at SHIELD's ratings, more people are seeing the movie than the show. SHIELD should have stuck with looking at Strucker's research, setting up more of the universe without detracting from the main event.
And the setup could be handled by Iron Man asking "Who gave us the tip about Strucker?" with Cap going "Maria got a tip from an old friend about Strucker's operations"
"Who?"
"Wouldn't say, she trusts him"
Essentially teasing Coulson, giving a background that could be delivered anytime during the scene, and showing Hill keeping information from the Avengers. I feel like Whedon might have been a little too excited about getting his TV show to relate to the movie, and hurt the film's beginning in the process. And the cartoony (IMO) CGI during that sequence let me think more about other weaker elements there.
And with the team hanging around, I'm not sure if that can really be explained well. I mean, Dark world had Thor leave Asgard with no real ability to return, so he could just be milling around on Earth - but it happened before Winter Soldier, that doesn't give a reason why it wouldn't have been mentioned then. Bruce and Tony are shown to be working together after Iron Man 3, and reveals in AoU reveal why Hawkeye isn't present in Winter Soldier, while still having him be able to talk to Black Widow, so those cases explain communication between the members. There's just no explanation to bring EVERYONE back together other than to fight Strucker, who isn't set up well (granted, he's a filler villain). However, the actions during the fight imply they've been working together for a while - something I bought into while watching, and something that could have been menitoned in SHIELD as a world-building line to fill a plothole that fans analyzing it later would notice.