Marvel has just redefined its new Ultimate Universe by killing off Tony Stark‘s Iron Lad, the leader who has assembled and empowered the team up until now. Ultimates #6 sees the team fully assembled at last, preparing to engage in a rescue mission. However, the Ultimates are led into a trap by Bruce Banner’s Legendary Hulk. With Dooms escape plan for the Ultimates disabled, the heroes are left with no choice but to fight against the Hulk and his Immortal Weapons for their lives, while waiting for Doom to teleport the team out.

https://screenrant.com/tony-stark-dead-ultimate-universe-iron-man-hulk/