Apparently it’s a limited series that acts as an epilogue to everything we’ve seen so far.

“After saving the universe, Steven is still at it, tying up every loose end. But as he runs out of other people’s problems to solve, he’ll finally have to face his own.”

Lookit Peri flyin on her disk!

AND SPINEL ON YDs SHOULDER

So looking at the villain pic the Gem in the upper right looks like Aquamarine fused with a Ruby, maybe Eyeball?

And the big pink one... maybe the whole “White Diamond tried to recreate Pink and it went horribly wrong” theory from when we first saw Spinel was on to something

there's also a Cactus Steven abomination...a Worm...two Lapis...White Diamond but pink???

oh god

And potential Lapis Backstory from those other twooooo???

didn't you even wonder who I used to be?
yes