So, I don't think that there are going to be another 27 names, and I also don't think that we're missing a half the cast, just a large(ish) handful of people, whose contracts might have not been locked down by March 27th. So, I've added 13 names, bringing the total to 40 people (we know some other people like the actors for Atumma and Namora are in Doomsday, and those twins, but just chairs),

1. Brie Laron (Captain Marvel)
2. Famke Janssen (Jean Grey)
3. Jeremey Renner (Hawkeye)
4. Evangeline Lilly (Wasp; People come out of retirement all the time)
5. Teyonah Parris (Monica Rambeau)
6. Tatiana Maslany (She-Hulk)
7. Mark Ruffalo (Hulk)
8. Hailee Steinfeld (Hawkeye)
9. Tom Holland (Spider-Man)
10. Iman Vellani (Ms. Marvel)
11. Elizabeth Oleson (Scarlet Witch)
12. Kathryn Newton (Stature)
13. Halle Berry (Storm)
Who else could get a chair?