Source: marvel.com

7. The Champions

(Marvel Comics)

Here's a newer team, but they have some promise.

After Secret Wars, the Avengers launched their All-New All-Different lineup. The team had new heroes with old names, such as Sam Alexander (Nova), Miles Morales (Spider-Man), and Kamala Khan (Ms. Marvel). When Civil War 2 came around, these three became disgusted with the actions of their adult cohorts and quit to form their own team.

They added The Vision's daughter Viv, the newly hulked-up Amadeus Cho, and the time-lost teen Cyclops, to form a new version of a forgotten Marvel team called The Champions. They seek to change the world, not simply protect it. However, as children, that's an awful lofty goal to aim for. But they’re making headway, especially now that they've reconciled with the Avengers and frequently team up with them.

They've also been known to work with Nadia Pym (The Wasp) and Joaquin Torres (The Falcon). Specifically, this team was assigned to Black Widow as a sort of secret assassination squad during Secret Empire.