For now, Marvel is believed to only be shooting scenes for Doomsday, with the timing of Reynolds' post strongly suggesting he's set to return for that, rather than later down the line. Indeed, some fans are eagerly anticipating a second big reveal of Avengers: Doomsday cast members, perhaps via a second set of chairs, as production continues.

A cryptic new Instagram post from Ryan Reynolds has fans speculating that the actor could be returning as Deadpool in "Avengers: Doomsday."

A year after he joined the MCU in Deadpool and Wolverine, Ryan Reynolds seems to be teasing a Marvel return in an upcoming Avengers movie. Reynolds took to Instagram to share the tease. In the picture, which you can see below, the Deadpool actor posted the Avengers logo with what looks to be the anarchist symbol spray-painted over the top.