Another concept could be that Naruto's chakra has some strange effect on Widowmaker. When they accidentally come into contact, it stirs something within her that starts to break the mind control she is under. This then makes her question her loyalty to Talon, and she and Naruto form an unexpected alliance to fight against the real threat that is manipulating both their worlds.
One idea could be a crossover with the 'Mass Effect' universe. Widowmaker could be a new type of biotic agent, with her unique skills and backstory adding a new layer to the 'Mass Effect' story. For example, she might be a character that Cerberus tries to recruit.
A plot where Widowmaker and Wasp are both framed for a crime they didn't commit. They must work together to clear their names while also dealing with the various factions that are after them. It could involve a lot of action, chase scenes, and the two characters having to use their unique skills to survive and expose the real culprit.
One idea could be a story where they are on a joint mission. Despite their different personalities and combat styles, they start to rely on each other more and more. As the mission progresses, they discover a common enemy that threatens not just their world but also their new - found friendship. This forces them to work even closer together, leading to a deeper bond.
They could interact through combat at first. Naruto might mistake Widowmaker for an enemy due to her being an assassin. He could quickly dodge her sniper shots with his speed. Then, they could start to communicate, with Naruto trying to figure out who she is and why she's attacking. Widowmaker, on the other hand, might be intrigued by Naruto's strange abilities.
One interesting idea could be the combination of Naruto's ninja skills with mecha technology. For example, Naruto might use his chakra to power up the mecha in unique ways. Another idea could be the new enemies that are created specifically for this mecha - Naruto concept, like robotic shinobi that require different combat strategies compared to normal foes. Also, the design of the mecha Naruto itself can be really cool, perhaps with features inspired by the Nine - Tails.
One plot idea could be that the Reader is a new recruit in Widowmaker's organization. The Reader is initially scared of Widowmaker but gradually discovers her past and the reasons for her current state. They develop a bond based on empathy and trust as the Reader tries to help Widowmaker come to terms with her inner turmoil.
One interesting plot idea could be a time - travel story. For example, Naruto is sent back in time to the era of the First Hokage. He could use his knowledge of future jutsu and events to change things for the better in the past. Another idea is a story where Naruto discovers a hidden clan within Konoha that has a unique and powerful Kekkei Genkai. He then has to help this clan gain acceptance in the village. A third idea might be a story where Naruto is turned into a different creature, like a cat or a fox, and has to find a way to turn back while still dealing with the normal threats to the village.
One idea could be a story where Naruto discovers a hidden nano - technology in the Hidden Leaf Village that was left by an ancient shinobi. This tech gives him new powers to fight enemies.
One idea could be a crossover where Naruto characters end up in the world of Nisekoi. For example, Naruto could meet Raku and they team up for some sort of mission in the Nisekoi city. It would be really cool to see Naruto's ninja skills in that setting.
One idea could be a crossover where Naruto characters visit the world of Boondocks. For example, Naruto and his friends could meet the Freeman family and have some cultural exchanges. They might be shocked by the different social situations in the Boondocks world.