Maybe a plot where Rose, who has her own experiences with the Doctor, and Martha, with her medical knowledge, find a strange alien illness spreading on Earth. They need to figure out its origin and how to stop it while also dealing with their feelings about the Doctor. For example, Rose might be a bit jealous of Martha's time with the Doctor, but they have to put that aside for the greater good.
A really interesting plot could be that a time - traveling villain tries to rewrite history to make it so that Rose and Martha never met the Doctor. They then have to travel through different time periods, meeting past versions of themselves and the Doctor, to stop the villain and preserve their own timelines.
One way is to have them go through a life - or - death situation together. This could make them bond more deeply as they rely on each other for survival.
Perhaps they get involved in a community project. They could be working on a local garden restoration. Through this, they face various challenges like getting enough funds and dealing with difficult neighbors. This shared experience strengthens their bond in the fanfiction.
Good 10th Dr Rose fanfiction often has a strong sense of the characters. It keeps their personalities true to the original show. For example, the Doctor's quirky and intelligent nature and Rose's brave and curious side. It also usually has an engaging plot, like time - travel adventures or facing dangerous aliens.
One idea could be that Rose returns during the 12th Doctor's time and has to adjust to his new personality. Maybe she teams up with Bill to help the Doctor solve a mystery on a strange planet. They could discover an ancient civilization that has a connection to Rose's past adventures.
One idea could be a crossover with the Justice League. Dr Fate could use his magic to help the League against a powerful magical threat that they can't handle alone. Maybe a dark sorcerer from another dimension is trying to invade Earth, and Dr Fate's knowledge of ancient magic is crucial in devising a counter - attack.
A possible plot could be that there are complications with her pregnancy. This leads to a journey to find a specialist or a special medicine. Along the way, she meets old friends and foes, and through her determination and the support of her loved ones, she overcomes the difficulties and looks forward to the birth of her baby.
One idea could be a reimagining of the rose as a sentient being that has the power to communicate with the beast. It could tell the beast secrets about the enchanted forest that help him on his journey of self - discovery.
Perhaps the 8th Hokage has to deal with internal political unrest within the Hidden Villages. Some ninjas might be unhappy with the new leadership and try to undermine the 8th Hokage's authority, leading to a complex web of intrigue and conflict.
One idea could be exploring the backstories of the minor characters in the 10th kingdom. Maybe a story about the life of a random villager and how the events of the main story affected them.
One idea could be a story where Martha May discovers the Grinch's kind heart long before the events of the original story. Maybe she stumbles upon him secretly helping a lost Who in the forest and realizes there's more to him than his gruff exterior.