Perhaps Regina time travels to a time when a great war was about to start in the fairy - tale world. She could use her skills and knowledge to either try to stop the war from happening or to side with a particular group to ensure a better future for herself and those she cares about. She might also form unexpected alliances during this time - traveling adventure.
One idea could be that Regina travels back in time to when she was a young girl. She could use her knowledge from the future to change some of the bad experiences she had, like standing up to her mother earlier. Another plot could be that she travels to a time before she became evil and tries to prevent herself from making the wrong choices that led her down that path.
One idea could be that Regina, trying to redeem herself, takes Roland under her wing to teach him magic in a secret way. This could lead to a series of adventures as they have to hide their lessons from the rest of the town. Another plot could involve Roland getting lost in a magical realm and Regina being the only one who can sense his presence and rescue him, leading to a journey of self - discovery for both of them. And perhaps they could team up to stop an evil force that is threatening Storybrooke, with Roland's innocence and Regina's power being a perfect combination.
Well, a plot could involve time - travel. Henry somehow gets sent back in time to when Regina was first starting to embrace her dark side. He tries to change her path by showing her the future and how she could have a loving relationship with him. Another interesting plot might be that there's a curse on Henry that makes him forget Regina, and Regina has to go through a series of trials to break the curse and make him remember their relationship. Also, they could be on a quest to find a magical artifact that can restore all the good memories of the people in Storybrooke that Regina once took away, and this journey brings them closer together.
There are quite a few Swanqueen little Regina time travel fanfictions out there. For example, 'The Time - Traveling Little Regina' where a young Regina is sent to different time periods and Emma has to follow to bring her back. This one is interesting as it shows a more vulnerable side of Regina and how their relationship evolves in this strange situation. Also, 'Regina's Time Warp: Swanqueen Edition' has some unique twists where time travel affects not only Regina's past but also her future with Emma in unexpected ways.
One idea could be a modern - day character traveling back to the prairie days and introducing new farming techniques. They could use their knowledge of modern irrigation methods to help the Ingalls family during a drought. Another plot could involve a character from the past traveling to the future and being amazed by modern technology like airplanes and computers. They then take this knowledge back to their own time and try to make changes in their community.
One idea could be that Twilight Sparkle accidentally activates a time - travel spell and ends up in the past, right when Equestria was first being founded. She has to figure out how to get back while also making sure she doesn't change history too much.
One idea could be that Regina and Dr Facilier form an unlikely alliance to take down a common enemy in Storybrooke. Maybe a new dark force has emerged that threatens both of their interests, so they have to put aside their differences.
Maybe she travels to a time during a great war. She could end up changing the course of the war by providing crucial information or by using her skills in a way that no one expected. For instance, if she found a way to counter an enemy's powerful jutsu that was thought to be unbeatable at that time. This would not only affect the outcome of the war but also change the future of the ninja world she came from.
Maybe Rumplestiltskin. Even though they have a complicated history, in a different time period, they might find common ground. He could be interested in her time - traveling abilities and offer his own brand of help in exchange for something from her future knowledge.
The concept of time travel in Swanqueen fanfiction with little Regina is appealing because it allows for a lot of creativity. It can change the course of the characters' relationships. For example, Regina can go back and change things that affected her relationship with Emma in the past.
One idea could be Madara traveling back to the era of the Sage of Six Paths. He could try to change the very foundation of ninjutsu, which would create a whole new timeline. Maybe he would attempt to gain the power of the Sage for himself much earlier in history.