Why are we saying canon can't be broken now? Most game's MP breaks canon, anyway.
Look at the Halo FPS series. Thousands of Spartans killing each other for no apparent reason?
Or HWs MP. Prophets did NOT go in and lead attacks on the battlefield. Arbitors did, somewhat, but they definetly did not say cheesy "I WIL DESTROY U" lines and fly through the air killing ten things at once.
For sake of MP, I would love a space battle type war, even though it would never happen in Halo reality.