Future Goku Character Facts

Future Goku lives the same life as Present Goku until his return to Earth after defeating Future Frieza on Namek. In this timeline, Future Goku uses the Instant Transmission technique to return to Earth, where he successfully kills Future Frieza and Future King Cold when they arrive in August of Age 764. 
Future Goku contracts a heart virus with no cure in Age 766 and dies six months before the appearance of Future Android 17 and Future Android 18.