Board Thread:News and Announcements/@comment-4224349-20150219162914/@comment-26808654-20150226014101

Professor Panda 2nd wrote: There's has to be a reason why they are doing a crossover, so I was thinking.. don't get me wrong but, I was thinking that maybe UG is probely relative to Steven, I mean, they are both magical? UG is probely Rose's mother's father, then yet UG doesn't have a gem, his "wife" probely IS a gem, UG is magical, then again, UG isn't really as magical, so maybe in this episode UG is gonna help Steven to get   to know his mother's powers, maybe UG knows something about Rose. I had to do a lot of thinking here but please don't get me wrong, it's just a thought I  wanted to share. A possible reason is the Rebbeca Sugar just wanted a crossover and the UG crew was cool with it (as well as the higher ups, of course).

Also, Unlce Grandpa is everyone in the world's uncle and grandpa (no explaination needed or given) so him being related to Steven wouldn't be surprising