Marvel and Disney have been testing Captain America: The Winter Soldier, and the scores have been through the roof. Its widely believed that this may be the best Marvel movie to date, which is high praise, and a bit of hype that the studio is clearly pushing itself. Since general audiences have been seeing the movie, news has leaked of the sequel's surprise post credit sequence, which promises to introduce two new characters to the Marvel cinematic universe.

WARNING: Major Spoilers! ahead...

The Marvel post credit sequence has become a grand tradition of all their films, with these stingers often introducing or setting up future movies. Thor: The Dark World has a post credit scene that helps set up Guardians of the Galaxy by introducing Benicio Del Toro's The Collector. It also establishes the hunt for the six infinity stones, which has been running through the previous movies whether we knew it or not.

Now, the Captain America: The Winter Soldier post credit sequence will help set up the next movie after Guardians of the Galaxy, Avengers: Age of Ultron, which will serve as the climax of Marvel Phase Two. The kicker is, we will see Elizabeth Olsen as Scarlet Witch and Aaron Taylor-Johnson as Quicksilver for the first time, and they promise to look like no other character yet introduced in the Marvel Cinematic Universe.

Lainey Gossip was at one of the test screenings, and had this to say about the big unveiling of these two awaited additions to the Avengers line-up...

"There's a big reveal that general audiences won't see coming (and ought to open some doors to fix that awful [Marvel's Agents of S.H.I.E.L.D.] show). But the thing that's probably going to leave people talking the most is the post-credits stinger. They're calling them "The Twins", the brother-sister team of Quicksilver and the Scarlet Witch, and they don't look like any Marvel heroes we've met to date. Having seen them, I am really sad for Fox and the X-Men: Days of Future Past...

With X-Men: Days of Future Past arriving in May, and Captain America: The Winter Soldier hitting theaters in April, it makes sense for Marvel to get a head start on revealing their versions of this brother-sister team, characters which are shared by 20th Century Fox and Disney. A photo was released last week that shows a young Scarlet Witch will pop up alongside her brother in Bryan Singer's franchise sequel, and you can decide for yourself how lame or not it may be.