i think if it was something like that, there should be some kind of catalyst to start things off, maybe even be the beginning or the end of a tentative truce between the races/species and kind of build things from there? kind of going along with the originals idea -i've only seen season one, so bear with me - maybe there's a hybrid child of some sort that's supposedly killed with different factions blaming everyone else and even suspicions on the parents' faction thinking they were using the death somehow to their benefit. years later the hybrid child shows up alive and well and all hell breaks loose. i imagine the hybrid child wanting peace but again everything is thrown out of balance and then it comes out that one of the parents hid the child, etc. and after all that it sounds almost hugely complicated to do all that. maybe expand on your idea? were you thinking more of the guerreras?