Superman Assassination Squad
Your mission, should you choose to accept it, is to assemble a team of 5 Marvel villians (below herald level) to kill Superman. The will have two days of prep time, know that Superman is vulnerable to certain types of radiation but they don't know exactly which, and know that he has a slight weakness to magic (I say slight because the man has withstood Cap Marvel's lighting and a shot from Thor's hammer without being killed, he is vulnerable but not that vulnerable).
The fight takes place in Metropolis on a Thursday at 1:40 in the P.M.
Also, there is no speed blitzing at that would make the fight too easy but both sides are going for the kill.
Who could kill the Man of Steel?