I been observing the manga for a while but i believe kishimoto will make Obito turn to a good guy because Obito actually admiring naruto personality and reflecting his behaviour to himself.I believe Obito will undergo the Nagato sydrome effects and suffer the same thing as nagato did when he faught naruto.However Obito when he turn good will use Kamui and absorb Madara into his own dimension .How will madara will exit the other dimension?Madara will stay trap in the other dimension forever in his edo tensi form