Kin and Kon's future selves are apparently Kin Kujira and Kon Kujira in the future. They apparently aren't far off in the future as they are the same height as their past selves and have the same voices as them. They seem to still be very close to them in age, with the only differences being the clothing they wear and their heads being shaved. Kin and Kon's future selves appeared in the episode "Cloudy With A Chance Of Malt Balls" where the movie projection for the Drive In Movie Theater went out and then inexplicably went back in just after they finished their song. It was then revealed that Kin and Kon's future selves were the ones who fixed it, as they were seen calling out to them from the projection tower and making the universal symbols for rock at them. They were later seen talking with Kin and Kon more and then playing air guitars together at the end of the episode.
Kin and Kon's future selves look just like Kin and Kon only their heads are bald which reveals their shiny scalps. They wear dark black shades and black suits.