(I don't own anybody or anything.)
Before creation a void was all there was until it decided to create an heir however the birth of it would lead to it's destruction. The divine heir felt guilty about it's creator's destruction but continued to live on which led to the birth of their siblings through the last of it's fragments and thus life began. However it was not the only universe created as darker universes were created and the deities that led to a war were they were defeated and new deities were born which led to the stories of the gods we follow today. During that era the universes were connected by a network of inter-dimensional passageways that made travel easier. Then a crisis happened were the network was shut down and only a few paths remained, however a great evil has arise that will consume all of reality and something must be done. In response to this the first goddess summoned multiple heroes from different worlds to combat this threat they are some of the strongest of their dimension:
And there came a day unlike any other when realities greatest heroes found themselves united against a common threat. On that day they became the ALLIANCE
Son Goku Sayian Martial Artist and protector of earth
Tenchi Masaki Prince of Jurai and champion of their goddess Tsunami
Gene Starwind gunner-for-hire and captain of the Outlaw Star
Naruto Uzamaki-Namikaze Jinchuuriki and hero of the Village Hidden in the Leaf
Monkey D. Luffy rubber boy and Captain of the Straw Hat Pirates
Ichigo Kurosaki Substitute Shinigami and Winter War hero
Claire No. 47 of the claymore's and Teresa's apprentice
Natsu Dragneel Salamander and Fire Dragonslayer mage of the Fairy Tail Guild
Satellizer El Bridget The untouchable Queen along with her Limiter Kazuya Aoi
Avatar korra elemental master and bridge between the physical and spirit world
W.I.T.C.H. Mystical Guardians and protectors of the realms
Rex Salazaar nanite user and Providence's secret weapon
Ben 10 plumber and Hero of Heroes
Anakin Skywalker, Obi-Wan Kenobi, and Ahsoka Tano members of the Jedi Order and peacekeepers of Their Galaxy
Swat Kats T-bone and razor ace pilots and defenders of megakat city.
Jak and Daxter The Demilition Duo
Ratchet & Clank The Dynamic Dou
The Cooper gang Criminal experts of the world
Dante son of the Dark Knight Sparda
Bayonetta Hybrid of two ancient races
Solid Snake Super soldier and living legend
Ragna The Bloodedge SSS rank criminal and holder of the Azure Grimioire
Kat amnesiac shifter and Gravity Queen Superhero of Hecksville
Together with their allies they are known as the alliance the most powerful force of good ever known however they've never faced a threat this dire before. And it will take all their skill to prevail in a battle for life itself.
Our World's about to break
Tormented and Attacked
Lost from when we wake
With no way to go back
I'm Standing on my own
But now I'm not alone
Always we will fight as one
Till the battle's won
With evil on the run
We never come undone
Assemble, we are strong
Forever fight as one
Assembled we are strong
Forever fight as one