This is a classic writing challenge.  What if a particular series or
movie was written/created by someone else?  For example, what if 
Sailor Moon was written by Takahashi?  Remember Takahashi hates writing 
sentimental moments so the characters are always awkward during them, 
and usually are interrupted before they go too far.  She likes to 
leave romantic triangles hanging, and makes many of them.  What if 
Ryoichi Ikegami wrote it instead?  RI has little sense of humor, a dark 
view of the flaws of Japanese society and a conspiratorial 
perspective that would make him perfect to do a Japanese X-Files manga.
Piers Anthony?  At last a writer who will have characters notice all
those panty shots.  

Two rules:  No Crossover/Fusions, but you can write the established
characters as OOC as you want, provided that they are IC for your chosen 
substitute writer.
    No Ranma 1/2.  That would be redundant, since loads of people have 
already written R 1/2 as though it was written by another writer.  
(Unless of course you can think of a _truly_ bizarre and 
distinctive author to do it.  James Joyce or Hemingway perhaps.)