So imagine that Yusaku is the one who's forced to take the apotoxin 4869 (say, after a Kid heist) and he pretends to be his own son (really convenient for hiding from his editors and thus, Kudo Shinichi is born). By the time the manga roles around he's a teenager and never found a cure. He knows who Kid was and that Kaito took his place so he's more active in the heists (whether up front or in the background). I haven't seen this yet but just imagining it is fun. I imagine that Yukiko and Yusaku's marriage was more for convenience to satisfy their parents and follow their passions; they're friends rather than lovers. That way Shinichi and Kaito can be a pairing (Yusaku's gotten used to being a teenager again [all the hormones...] and Yukiko has always wanted to see Yusaku and Kid together).
terrible metaphor, yes i agree, but these prompts just keep rolling in my skull and for the life of me i don't have the perseverance to write a fic. so if anyone actually finds them interesting let me know-i'd love to read what you come up with.
sherlock (bbc tv)-
nobody remembers john except sherlock and its driving him bonkers. i've read just one fic relating to this (surprised, i'd think this would be popular...) and it ended up being a drug-induced hallucination. it's always fun to read from sherlock's POV and i figure there's so many other ways for john to vanish ei. john's one of the fey, the fey are messing with sherlock's mind, aliens are involved, magical realism (boy does that one cover alot), mad scientist invention, etc. etc.
sherlock the slenderman has abducted/spirited away/kidnapped john as a child (that seems to be the underlying goal of slenderman in alot of the fics i've read-people disappearing mysteriously, or dying [but never john!]). but this one is different! john returns from wherever slendermen go and he's an adult? not sure if he should be an adult or just stay a child... but everyone's freaking out because a missing person has showed up (lestrade as the main officer?). and the best part; slender sherlock has come back to find john again. i still don't know how john got back to our plane of existence, if it was accidental or not, and this can be scary sherlock lonely sherlock etc. i can see it ending happy or sad for him (preferably happy, lonely sherlock makes me want to friend him so much!)