Why would Whedon even care if Fillion is Ant-Man. Wright's clearly making his 60s spy thriller, so wouldn't that, on the surface, make this not a part of this particular MCU that the rest of the movies are in? Has Whedon looked and/or done anything as far as the script? Just curious.
I think there have been several re-writes on the script since the report that it would set in the 60s. I can't imagine they would make an Ant-Man movie and not have it be part of the MCU.