The Avengers: Endgame press is kicking off with “fan events” in various places, so presumably that’s why this is only three of them. Well, that, and I guess we’re not supposed to know who exactly turns up again in this one, or when, or… I saw Infinity War and I honestly mostly just felt relieved at the end that it was a smaller group of people to track, but I promptly forgot WHICH people they were. I’m going to hazard a guess that Scarlett is included. BRILLIANT deductive powers there.