The cover doesn't kid! Nitro, the ultimate suicide bomber who actually reconstitutes himself to blow up another day, attacks. But that's not what zaps Captain Marvel right between the eyes. Leads to the graphic novel. In your face, Superman.
Marvel XP: Dossiers/Nitro - Marvel: Avengers Alliance Wiki - Guides, Items, Characters, and more
Nitro in Marvel Knights Spider-Man #3
Nitro - Xsplosion Man (Marvel Comics) by Nickolas Lane
Captain Marvel: The Death of Captain Marvel
Nitro (Robert Hunter)
Iron Man Enemies