At the end of the Destiny campaign, all 5 races were fighting us? The Vex, Hive, Fallen, Cabal, and The Fifth Race, all trying to kill us? We would have to use our pure skill to defeat them. We would keep fighting, and not rage quit, and win the final battle! It's just an idea. What do you think?
What if at the end of the game, there was an extremely anti climatic ending boss battle, and no loose ends were tied up. <----Dark Souls 2 What if the ending was the reveal of the traveler, just before satisfying you with the big mystery unveil, everyone got Rick rolled? <----I wish What if at the end of the game, we had to battle the darkness in mass armies, while the credits rolled. A never ending battle would be cool to see how Long you could last. <----This needs to happen I don't like to actually try to think about how any game is going to pan out. It's hard to avoid if the game is easily predictable, but it's best to just experience it. Potato
I like it, but as Soryu217 said it might not happen, but I think it could happen if the guardians annoyed the aliens enough as their hate for the guardians might build up enough for them to join forces, for a while at least. or the darkness might demand they fight together, if they are under the control of the darkness that is.
If you mean all 5 alien factions working together, that is unlikely as bungie has already given examples of enemy factions fighting against each other. Some factions might cooperate though