A new boss themed White Space Swarm.
It would be a static white cube with purple/black markings.
It makes wreckage fall from the air, shoot pillars from the ground and summons a load of Void mobs.
In order to hurt him, you will need to do something like the Vana mask and afterwards hit him up for as long as he's vurnable.
Three stages, every stage it loses some chunks and tears open a bit.
A remix of White Space Swarm would play as battle theme.
There will be statues of all other bosses after finishing the level.
This will be a rather hard boss, giving Vanguards a bit of a challenge.
How to get to this boss?
Reach the Core and it will open up for free or for some CE, open for discussion.
Then you will do 4 White Space Swarm levels similiar to the Vanguard missions but as addition, a new feature being moving platforms.
Feel free to comment and share your opinion.
I have a pretty good feeling there's already a Swarm boss model through both file snooping and paying close attention to Dreams and Nightmares.
Also, look up the track Shadow's Swarm by Harry Mack.