Next Avengers: Heroes of Tomorrow

Next Avengers: Heroes of Tomorrow is a 2008 American animated superhero film directed by Jay Oliva and Gary Hartle and starring the voices of Noah Crawford, Aidan Drummond, Brenna O'Brien, Dempsey M. Pappion, Adrian Petriw, Tom Kane and Fred Tatasciore. The fifth installment in the Marvel Animated Features (MAF) film series, it follows a group of young superheroes who are the children of the original group of Avengers and must defeat Ultron.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.