Leaked Avengers: Doomsday teaser is now public

You've no doubt heard some version of the Robert Burns adage about the best-laid plans. Marvel Studios had an elaborate marketing plan in place to introduce four teaser trailers for Avengers: Doomsday as previews prior to screenings of Avatar: Fire and Ash, with one teaser rolling out each successive week. But the first one leaked online a few days early, revealing that (as rumored) Steve Rogers/Captain America (Chris Evans) will appear and will have a newborn baby, presumably with Hayley Atwell's Peggy Carter.