[quote=@Alphakoka]
None of my people seems to be the sort to join any group with grand scale goal like those unfortunately.
[/quote]

Have you even seen any fighting games? Their characters usually have a thinnest of back-stories and fight each other for no reason.

I've always thought the multiverse needed an ultimate goal to motivate the characters and drive events. A main quest to complete. Perhaps a simple collect-the-McGuffins for ultimate power? Therefore, people with similar goals, such as world peace or destruction would band together.

Another idea that might be fun would be the manga HunterXHunter's greed island arc.