i've seen the one where "fanfic author" enters the mileau of a
particular anime, or even (as in Ring Of Toltiir) where the author
is sticking another author in the series.
Has anybody done it where the seiyuu or actual writer of the series
(without Phenomenal Cosmic Power)  is thrown into the setting?
        I thought about this with the idea of Megumi Hayashibara
(goddess of cute IMO) abruptly flung into the Tendo-ke. Or maybe
as part of some cosmic justice, Takahashi-sensei must resolve
the problems of the Nerima crew...