1. Make it a poll.
2. This guy is always (ALWAYS!) the Big Bad.
![]()
It sounds to me like none of these factions would make for a compelling main antagonist. Maybe you should introduce something else, that poses a threat to all these factions. Then leave it to the players to form an alliance.
I'll sex it up a bit with an individual.
Vanthus Vanderboren is the BBEG atm, and Cervantes the Dread is a famous pirate presumed dead..
I'm running a sandbox game with several villains. The theme is Happy pirates and I'm using There is No Honor from the Savage Tide as my base game. I have several contenders.
The Elves
The Elvish Imperium is past it's heyday but House Kueryll and Jerith'Kor are determined to rebuild their legacy. The have recruited vicious insectoid soldiers into their forces.
The Knights of Vanya
A military order founded in Solaria devoted to kicking the elves out of Solaria. Since the defeat of the Imperium they were expelled to Kriegsburg for being to extreme. They are human extremists devoted the "the purge". Exterminate!
Yuant Ti.
The serpent people linger in the ruins of the ancients and observe. Responsible for the slave trade such unfortunates usually end up as food. Or used in experiments by Coiled Cabal biomancers.
The Crimson Fleet
Preying on the Elvish Main these pirates are based out of Scuttlecove. Any who fall into their hands often end up as slaves sold to the Yuan Ti as bait.
The Hive
A new player that is providing troops to the Elves. Unknown to them the drones are part of a collective conscious that regards other lifeforms as food. Eat now?
Definitely remove the Hive. That one seems a little off-topic for the various themes your going for.
The Elvish Imperium seems like the best "main" foe... you can throw in a lot of the Spanish Empire/Dutch East Trading Company themes there, trying to control their diminishing influence.
I may keep the Yuan-Ti, either as a secondary antagonist, an untrustworthy ally, or the true "puppeteers behind the conflict."
The Crimson Fleet and Knights are great too, but work better as allies to the PCs I think than their enemies.