[Aries Walker]

Originally Posted by Deberg_1990

Spoiler!

So who were the boy and girl in the hidden scene at the end? Good guys or bad?

They were

Spoiler!

Quicksilver and the Scarlet Witch, brother and sister from the comics. He is haughty and kind of obnoxious, can run at super-speed, and is very protective of his sister; she is emotionally somewhat fragile and is capable of throwing 'hexes' which make the improbable - a rope breaking, a water main rupturing, that sort of thing - more likely to happen. (Judging by the clip, though, they may just make her telekinetic.) They were at first villains, then became long-time Avengers later on, an arc which they could very easily follow in the movies.