Basically the main stuff to take away from the credits is:
The dreambubbles being destroyed is confirmed.
It confirms when the Caliborn’s Masterpiece fight takes place, It’s when the kids are 20.
Sprites and consorts are confirmed still around
Possibly Dirkjake is canon once more
So is possibly Davekatjade? Not 100% sure but it looks like it.
Roxy/Calliope is possibly canon as well (rip in peace johnroxy)
ROSE AND KANAYA GOT HUMAN MARRIED!