Captain America: The Winter Soldier Rumors

Rumors referencing "The Twins" appearing in the end credits of Captain America: The Winter Soldier are surfacing. The leading theory is that these twins will be the mutants Wanda and Pietro Maximoff, aka Scarlet Witch and Quicksilver, two Avengers main-stays.

Joss Whedon has already confirmed the two characters for Avengers: Age of Ultron. It makes sense that there would be a nod to them in Cap 2 since it's the final Marvel Phase 2 film (not including Guardians of the Galaxy) before the Avengers sequel premieres next summer.