Iron Man's Hulk Cameo is Part of a Bigger, Secret Story

Tony Stark has history with Thunderbolt Ross.
Robert Downey Jr.'s Tony Stark had a cool cameo in The Incredible Hulk - and tie-in comics provide the context.

Iron Man's Hulk Cameo is Part of a Bigger, Secret Story

Iron Man, Disney Wiki

Who do you want to see pop up in Avengers: Secret Wars? : r/Avengers

Archive ScreenRant

The Avengers brings big names together

Archive ScreenRant

Iron Man's Hulk Cameo is Part of a Bigger, Secret Story

What are Marvel's Ten Rings? Comic Origins and Powers Explained

Avengers: Secret Wars (2027) - News - IMDb