Our best guesses from the Discord thread:
Zemo (there’s a very convincingly similar picture of Zemo, and you can make out the ridges of the crown of his mask.
Couch-lounger. Not a martial artist. Looks extremely like a TV remote in one hand and a drink in the other. Could be any number of people, but Danny remains a good possibility (Martial-arts based Heroes wouldn’t likely be in a martial-arts pose in Alter-Ego anyways)
Looks bald. Miles Morales isn’t a bad option (crew cut), but I personally lean towards Vision, because:
Quicksilver. It could be Matt Murdock, or really any number of people, but that hair just screams Quicksilver to me. Especially since:
Scarlett Witch. Wanda is one of very few Heroes with such curly hair as a part of their normal aesthetic, and most of the rest don’t seem likely to be chilling in heels. Add in the fact that she’s got a show coming out around that time... it’s not a done deal, but it seems most likely to me.