This is on the back of Venom's box -

Based on prototypes stolen from his nemesis MR. FANTASTIC, DOCTOR DOOM builds a series of mechanized war-suits for the use of the world's worst Super Villains

Obsessed with the destruction of SPIDER-MAN, VENOM welcomes any advantage. This powerful war suit allows him to cruise the city streets in secrecy, searching for his quarry. It's got the speed to pursue any target, or outrun any hero that might give chase. When it comes time to fight, his mech mode spews out volleys of powerful missiles capable of blasting other war suits to pieces.
I've never read Marvel TF comics but i'm guessing that's no tie-in