General Zod has assembled a team of some of Superman's deadliest villains and has brought them to Marvel Earth in a bid to take over the world.
The team teleports on the Moon, where they have 24 hours to survey the planet and formulate a strategy to eliminate it's defenders and topple it's governments. They ultimately want to rule the planet, so they don't necessarily want to destroy everything in the process. A few major cities, sure, but no monumental damage to the actual planet itself, lest they render it uninhabitable and worthless to rule over.
Earth's defenders have no idea what's coming until the first strike, wherever that may be.
This is current Marvel Earth, in the Post-Secret Wars era.
New 52 versions of the Supermen.
Zod's team are:
General Zod
Cyborg Superman
Bizarro
Ultraman
Metallo
H'el
Parasite
Doomsday
Brainiac
Mongul
How does this battle play out?