This may be NOT TRUE but what if Rose was Pink Diamond?
What if Crystal Gems was hiding a secret about Rose was Pink Diamond because they fear Steven will be corrupted and ruthless like Yellow Diamond, Blue Diamond and even White Diamond.
What if Steven inherited the role of Pink Diamond? Could Pink Diamond being the most powerful Diamond of all-time? If this happens, What is CGs' Reaction of seeing their Steven become Pink Diamond. They will realize that he's no longer our baby anymore and will bow down before Pink Diamond.
How would Steven feel of becoming Pink Diamond and start to treat CGs if they were his servant instead his family?
What if Steven realize that he may never being with his father, Connie and even most of Beach City Civilians because they're all NORMAL HUMANS!
I know this theory may debunked but hey, It's fun to make a theory!