Won't Back Down [Marvel/DC Site, Open Canons!]

It
all started when a crystal dropped into existence, punched a hole in
time and space and landed into the lap of one the most insane men to
ever walk the Earth. At first, the clown didn't know what he had been
gifted with, stuck in his cell in Arkham, staring at the reddish purple
crystal laying innocently on the dirty stone floor. And then the voices
started, telling him of another universe, talking of power and chaos
beyond what he could have ever dreamed. Joker followed through, wanting
to know where this would go, wanting to find out just how much fun it
would be.

With a little strong armed help, a machine was rigged
to harness the power in the little crystal and much too eager for the
party to begin, Joker tossed the switch. In a sudden, disorienting flash
the maps of the world had changed, people and things that had never
even been seen in a dream suddenly blinked into existence, the clowns
world had collided with another. It's only been a few months since then
and uneasy alliances have formed between the heroes of either word, the
villains though, oh those crafty villains, they have a trick or two up
their collective sleeves.

Brought together in an admittedly shaky
truce under one man, their goal? Target key SHIELD facilities and
operatives and take them out, bring the operation to its knees. SHIELD
is already stretching itself thin looking into the sudden crime boom and
recruiting new bodies, they're about to be caught unaware by the sudden
attack. The real question though, is why did this man bring all of
these unsavory characters all together? Something else is driving these
players, the story isn't just an attack on SHIELD, but a deeper plot set
to throw everything into turmoil and when it comes into the light, it's
going to make everyone wish that damn clown had never thrown that
switch. It's time to pick a side and show the world

that
they won't back down