Grandpa Harley, Where Are You?

I know this may just be speculation, but I have a serious question: what happened to the not dead Grandpa Harley?

He was the one to pick up dead dream Jade, and disappeared with a fleetship with Mom and Dad. But we never see him again after that panel. Like, where did he go?

I guess we can assume he's dead, but I'm curious as to his whereabouts. Has anyone caught this?

They went back in time to become the guardians after that I thought.

do you know how long it took me to see that sooby do.


chao.

dO YOU K NOW HOW L O N G?????

AHAHAHAHAHHAHAHAHAHA