Lets see, so far in the majority of these clips we've seen nothing but banter and fighting/explosions. Yep, that sounds like the Joss Whedon writing style I remember from 2012. "Forget plot and building character development, we have to make sure every character gets their fair share of zingers in, while explosions are going off in the background".
Even freaking Ultron is bantering now....this is why I prefer the Winter Soldier as a villain. He was the silent/deadly type who didn't waste time cracking jokes and just went straight for assassinating. Plus he has a heart touching, conflicted back story aka character development.
Although I will give Marvel one bit of credit. They ARE putting out all these banter clips and trailers, which wipes away any thought in my mind that this film will be the dark and ominous one I saw in the original trailers. Thanks to this move, I don't feel like they created another "bait and switch" marketing campaign like they did in 2012.