Young Jijii's Dragon Ball AF ( otherwise known as DBAF) is what Young Jijii thinks should of happen after Dragon Ball GT.
The Ize saga is the first Dragon Ball AF saga. It starts 3 years after the end of Dragon Ball GT. Now characters are older and can go new forms. For instance, Pan is 16 and Vegeta can go Super Saiyan 3. It starts in Frieza's spaceship when Ize is born. He would like to battle strong warriors. He hears of Earth and how his father was defeated there by Son Goku. The Z-Fighters sense the power and head there right away.
Vegeta makes fun of them for being Frieza's underlings. Vegeta fights him anyways and stands a great chance. However, he is defeated even in Super Saiyan 3. In H.E.L.L, Frieza tells Piccolo about the thawing periods for his people. Ize is over 10x stronger than Frieza thanks to this thawing period! Piccolo tells Gohan. Ize is ready for Vegeta to "try again"
Vegeta uses a Blutz Wave Capsule to go Super Saiyan 4. Now he is stronger than Ize! Ize than reveals his 2nd form. Now he is stronger than Vegeta! Gohan also goes Super Saiyan 4. Goten and Trunks fuse into Gotenks. They go Super Saiyan 3. Uub powers up, too. They they are finally strong enough to defeat Ize!
But, all hope is lost when Ize comes to his 3rd form. He first defeats Gohan. Pan comes to attack. Pan dies trying. Angered, Gohan goes Super Saiyan 5. He fights Ize again. He finally kills Ize.
Chyoko and Marble Saga
The Chyoko and Marble saga is the 2nd saga in Young Jijii's AF. Gohan and Vegeta go to the Kais to train. They go Super Saiyan 5. Chyoko wants to make havoc in the world. Marble agrees and they go. Goten and Trunks fuse into Gotenks and they overpower Chyoko, easily. Uub fights Marble in a tough battle, He wins.
Chyoko and Marble fuse into Chyokomarble. Gotenks goes Super Saiyan 4. Gotenks is winning, but the time limit goes out because they are not stable with the power. Luckily, Uub has enough power to fight them. Chyokomarble is weakend badly. He loses to Uub for those reasons.
Super Shadow Dragon Saga
The Super Shadow Dragon Saga is Young Jijii's 3rd saga.