For months, the notoriously stingy Marvel Studios had done an admirable job of keeping all details on the upcoming, epic-sized blockbuster "Avengers: Doomsday" under lock and key. The only real promotional effort to date has been that mind-bogglingly questionable stunt involving empty chairs in a warehouse that unfolded for the better part of a day. (For once, we're pretty certain the loose-lipped Tom Holland and Mark Ruffalo are innocent of all charges.) This latest leak comes from the personal Instagram account of makeup artist Giovanna Ponci, who appears to have worked on the film (though her IMDb credits have not been updated to reflect this as of yet). The picture spread like wildfire throughout social media, such as this post by the Cosmic Marvel account, which we'll discuss in spoilery detail further down below.