They should make an option in the class selection screen where one can select the option import.
First you have to set up a script with the character's info, models, attacks, etc.
I think it would be a great solution for replacing characters with other models, and not changing the attacks...
Do you think the birth of Ultra Sayains will come? After SSJ 5 there can't be more SSJ levels, cause one will lose count of all the levels and hair styles.
Ultra sayains should have Silver hair color and have glittering auras.
Just a thought.