Another plotline could be that Goku is kicked out of a tournament. Perhaps he breaks some new rule that the organizers made up. As a result, he has to find another way to prove his strength, like challenging the tournament winner privately or finding a new tournament to enter.
One possible plotline could be that Goku gets kicked out of the Z - Fighter group. This might be due to some misunderstanding, like when he accidentally endangers the group during a battle. Then he has to prove himself again, going on a solo journey to train and become stronger so he can earn his way back in.
One common plotline could be Goku being betrayed by a former ally who is jealous of his power. For example, a fellow Z - fighter might feel overshadowed and make a deal with an enemy to take Goku down. Another plotline could involve Goku being betrayed by someone he trusts from his home planet, who has been corrupted by an evil force. It could also be that a new character, who initially seems friendly, betrays Goku in order to steal his Saiyan powers for their own dark purposes.
In a fanfiction scenario where Goku gets his tail back, it might be due to a genetic experiment gone right. Some scientist in the Dragon Ball world, either good or bad, might be working on Saiyan genetics. They accidentally (or on purpose) trigger the regrowth of Goku's tail. Once he has his tail back, it could change his relationship with other characters. His son Gohan might be really interested in his dad having a tail again. Also, Goku could use his tail in combat in new and unexpected ways, like using it to grapple opponents from a distance or as a distraction during a fight.
One interesting plotline could be that when Marinette is revealed, her friends are initially shocked but then quickly come to support her. They realize that all the times she seemed a bit flustered or had strange disappearances were because of her secret identity. For example, Alya might feel a bit guilty for not realizing it sooner but then uses her blog to help Marinette manage the public's reaction.
Well, one possible plot could be Naruto leaving Konoha and finding a new group of allies who are also outcasts. They then form a powerful team to prove themselves to Konoha.
In some fanfiction, there could be a plot where Gohan and Goku get transported to an alternate dimension. There, they face challenges that force them to rely on each other in ways they haven't before. They might have to team up against powerful foes that are unique to that dimension and in the process, their relationship deepens.
One interesting plotline could be Goku discovering a new form during the Tournament of Power in the fanfiction. This form might give him an edge over the other powerful opponents.
One possible plotline could be Goku and Gohan going on a special training adventure together in a fanfiction. Maybe they discover a new power or technique during this adventure. Another could be them facing a new and powerful enemy that they have to overcome using their combined strength and family bond.
A possible plotline could be that Goku and Bulma's marriage leads to a new era of peace in the Dragon Ball universe. With Goku's strength and Bulma's intelligence, they could start initiatives to better the lives of all the races in the universe. They might also have children with unique powers that are a combination of Saiyan and human genetics, and the story could follow their growth and development.
I'm not entirely sure specifically what 'rwby kicked out fanfiction' means without more context. It could potentially refer to RWBY (the animated series) having some sort of issue with fan - made fictional works, perhaps they were removed or there was some kind of ban on them.
It could be Vegeta. Vegeta might kick Goku out of a training session because he feels Goku is showing off or not taking the training seriously enough. Vegeta has always been competitive with Goku and this could be his way of asserting his dominance.