Well, it might be that Ruby arrives in time to save Pyrrha. Instead of the tragic ending we saw, Ruby's silver eyes power could have been triggered earlier and she could have turned the tide against Cinder. Also, the relationships between the characters could develop differently. For example, Blake and Yang might not have their falling out as in the original, and they could work together more effectively to fight off the enemies.
In the RWBY Volume 3 alternate ending fanfiction, there could be a situation where the Beacon Academy doesn't get completely destroyed. The professors and students could come up with a better defense strategy. Ozpin, for instance, might reveal more of his powers or knowledge in time to prevent the worst. And the characters like Weiss could have a more significant role in the battle, using her family's resources in a more creative way to save the day.
Pyrrha could be the hero. If she had survived, she could have gone on to become a more powerful huntress and a symbol of hope. Her skills and determination were already great, and in an alternate ending, she could have overcome Cinder and led the charge against the Grimm.
One possible scenario could be that Doctor Strange saw a different future where they managed to stop Thanos before he got all the Infinity Stones. So, the Avengers might have worked together more effectively from the start. For example, they could have sent a team to intercept Thanos on his way to collect the stones on different planets.
One possible scenario could be a character being betrayed by a teammate. For example, Ruby might be betrayed by Weiss if Weiss is lured to the dark side by some powerful and evil force. This could lead to intense battles and emotional turmoil for Ruby.
Well, they might be shocked at the turn of events in Volume 3. For example, Cinder could be secretly pleased with how her plans are progressing while outwardly showing a calm facade. Roman might be frustrated if things don't go as he expected in the fanfiction, like if his heists are thwarted more easily than in the original story.
One possible scenario could be that the members of Team RWBY reunite after a long and dangerous mission that had separated them. They might share their individual experiences during that time, with lots of hugs and laughter.
In some 'rwby neo dies fanfiction', Neo might die due to the consequences of her own actions. She could have made a deal with a dark force in order to gain power, but in the end, the power overwhelms her and she succumbs to it, taking her life.
In some 'rwby ruby kills' fanfiction, it could be a situation where Ruby is forced to kill in self - defense against a powerful Grimm that has infiltrated a populated area. Maybe she has no other choice but to use her scythe, Crescent Rose, to take it down.
One possible scenario is that Naruto uses his Sage Mode to sense Salem's true nature and the source of her power. Then he can target that source and use his unique techniques to neutralize it. Another could be that he forms an unexpected bond with Salem, similar to the bonds he formed with his enemies in his own story. Through this bond, he gradually changes her perspective and saves her from her path of destruction.
A really interesting scenario could be where Thor aimed better when he had the chance to kill Thanos. He could have ended the whole threat right there. If he had struck Thanos in the head instead of the chest, the events of the snap would never have occurred, and the universe would have been saved from that mass destruction.
Another view could be that the alternate ending is a way for fans to explore different narrative paths. It could be a way to satisfy those who felt that the original ending was too sad or left some loose ends. It might introduce new plot elements, like new characters who play a significant role in changing the outcome for Hazel and Gus. It could also be a means to explore different themes, such as the power of love in a more positive light, rather than the bittersweet way it was presented in the original.