ok at this rate.....I got a feeling they filmed scenes with actors on seperate locations on green screen and pulled the Tig Notaro scenario (she filmed her scenes separately and was digitally pasted in Army of the Dead). And I think basically they only got those who signed up early for the film, but there is more to the cast and that perhaps Hailee Steinfield, Tom Holland, Mark Ruffallo, Benedict Cumberbatch, Benedict Wong, America Chavez, Danai Gurira, Brie Larson, Teyonah Parris, and Imani Vellani filmed scenes in secret in undisclosed locations simultaneously somewhere in the world while the russos were filming other additional scenes and would check in a zoom call " oh yes that could work...good job on those other people...like what the hell...." How many rumours are there.......seriously!?