How much power does Roma still possess? The older Shogo gets the less his imagination has the power to turn him into a dragon right?
Can't Roma give Jubilee some kind of dragon claw or dragon scale amulet that would allow Shogo to transform when he grows up when not in Otherworld?
He would still be able to have his happy moments and Jubilee can continue raising him. Then she can have Evangeline Whedon give him some teachings on how to be a dragon out in the real world.