Rainbow Red

My theory about Rainbow Red. When the Second Rainbow Steve defeated the darkness, the Red Steves basically went extinct. There's no sign of a Red leader so we can assume that the leaders also went extinct too. All the other kings took back their crystals in fear of losing them. However, if the red leader went extinct then nobody could have taken the Red Crystal. A normal Red Steve couldn't obviously have the power to do that. Only the leader but he was dead. So my theory is that Rainbow Red is the second Rainbow Steve but without all his colors other than Red. Rainbow Steve still possessed the Red Crystal so he became Rainbow RED. That's probably why Rainbow Red has the Red Crystal and it would also explain why Rainbow Red said he'd only give the Red Crystal if Sabre brought the others together, because Rainbow Red needs every crystal to become Rainbow Steve once again.