UPDATE: We now have a more detailed breakdown from reddit user murdockmanila :

These brief decriptions were collected from Twitter, so there's always a chance that they may be a tad rough and/or possibly fake, but if true, you should get a pretty general idea of what was shown. Still no word on Black Panther or Spider-Man, but considering the Black Panther was a part of Marvel's D23 trailer, it's more than likely he was also a part of this trailer. As for Spider-Man, it sounds like he's still Marvel's best kept and most guarded secret.Also, in case you wanted to know,(Once Upon A Time) received the largest ovation when he showed up for the panel afterwards. And for those of you that were hoping for a trailer leak, you're probably just better off waiting for the official trailer release as many are saying that the convention's security team was on point early and were picking up cell phones long before the footage ever played.