Holy grail war yes please.
Been thinking about this one for a little bit.
It Begins
Science holds that this universe we live in was formed by the big bang, religion holds that it was created by a divine being. Both are equally correct and incorrect at the same time. In the earliest stages of the big bang, our universe was filled with billions of highly intelligent beings. These beings are what religious people would refer to as gods. From the time the expansion of the universe started as a cloud of superheated radiation, to the time when the first stars and galaxies were formed; a war was waged between these primordial life forms to decide which would use this emptiness as their canvas, and paint the worlds as they saw fit.
And of course the sequel
It Ends
All of the defeated gods rise up from their graves as the universe grows so big that it starts to break apart. Time becomes nonexistent as past, present and future all begin to coexist. The god who had previously won the rights to create this universe as they saw fit has grown old and decayed. As time fell apart and the gods of old rose again, they took revenge on the old master and ended their life. Now a new war is waged between the gods to rewrite history and save this dying world. But this time there's a new piece on the board - humanity.