I've had an AWESOME idea for a new BG!! (mainly given from the Demon Hunter reviving quest in Blasted lands).
You have a fixed number or resources/possible player deaths per team.
Each team has a base with an invincible necromancer in it
There are two "holes in the nether" that are returning Demon Hunters to the real world.... alas in pieces. Pieces can be legs, arms, bodies and heads.
At the start a random piece of a demon hunter spawns at each location, you have to collect one (or both if the other team is fail) and bring it back to base.
Once both pieces are returned to bases, a new two pieces are spawned.
You can always see what pieces the other team has, so some times it may be better to guard /destroy a piece they need rather than going for a new piece yourself.
Once you have managed to build a full Demon Hunter, the Necromancer brings him to life as a boss and he runs rounds with you one shotting players happily until they run out of resources... or finish their own demon hunter to fight him.. but by then you may be well on your way to finishing your second Demonhunter, and so on and so forth.
It's morbid sure, but it could be a laugh