One subtle reference comic book fans may have noticed is that, at the end of the battle against Ultron, it's The Vision who saves Scarlet Witch, giving the two a brief moment which is a sure nod to their romantic relationship in the comics. In fact, they even end up married, and while the movies will be unlikely to take such an involved route, don't be surprised to see a comic relief romance blossom between the two during Civil War, considering they will both be in Captain America's new Avengers line-up.