He should just do Space Marines or DBZ.

It's not boring and the ideas behind it matter in relation to the characters, preventing Cap and company from being thought bubbles we the audience just adds more shit onto regardless of any personality they have - uhuhm Synder's two DCCU films

Elektra was hardly worth reading in the comics though before she died.. not much personality

Duh we need Superman. He's a feel good hero with international interesting world building to pull from. Anyone who says he doesn't work is just bullshitting themselves. If you can't make any character work then you shouldn't be storytelling