Two scenarios:
1) Team vs Team Fight
The Twelve want access to Cerebro, so they mount an assault on The X-Men's school to try and steal it. They have 24 hours prep-time.
The X-Men have no idea they're about to be attacked, but have their standard defences in place like any other day.
Everyone has their standard powers, weapons and equipment for this fight.
The Sinister Twelve
Dr Octopus
Green Goblin (Norman Osborn)
Electro
Sandman
Mysterio
Lizard
Kraven
Rhino
Vulture
Venom (Eddie Brock)
Scorpion
Hobgoblin (Roderick Kingsley)
The X-Men
Cyclops
Storm
Beast
Nightcrawler
Archangel
Iceman
Wolverine
Colossus
Rogue
Gambit
Bishop
Warpath
2) One on One Battles
Fights take place in Manhattan. Opponents start at opposite ends of Central Park. No prep-time. No BRF's.
Standard powers, weapons and equipment for all combatants.
Dr Octopus vs Beast
Green Goblin vs Cyclops
Electro vs Bishop
Sandman vs Iceman
Mysterio vs Gambit
Lizard vs Nightcrawler
Kraven vs Wolverine
Rhino vs Colossus
Vulture vs Archangel
Venom vs Rogue
Scorpion vs Warpath
Hobgoblin vs Storm
Who takes these match-ups?