Marvel Studios dropped a surprise new "Avengers: Endgame" trailer Thursday -- and the sentimental preview features flashbacks to the origins of some of your favorite heroes.

It also features Captain Marvel!

The clip opens with Iron Man still floating in space after his battle with Thanos, sending a goodbye message to Pepper Pots.

Then, it shows flashes from the original "Iron Man" movie, before turning to Captain America's first film. Thor gets his flashback about a minute in, standing next to his now fallen father.

All the clips intertwine with new footage of the characters now, dealing with the aftermath of losing half of the galaxy's population.

Then it turns to the plan, as Black Widow says, "Even if there's a small chance, we owe this to everyone who's not in this room to try."

The last minute is heart-pumping action from the remaining heroes all saying, "Whatever it takes," as we see a montage of action from the new film, which will be out next month.

Then we get a look at the space suits the team will wear as they head to take Thanos head-on!

The clip closes with the two mightiest heroes of all, Captain Marvel and Thor, going eye to eye before he says, "I like this one."

"Endgame" is out April 26.

Marvel and ABC News are both part of parent company Disney.