Well, let's face it, NIMH 2 sucked, the sequel to Mrs. Frisby And The Rats Of NIMH, Rasco And The Rats Of NIMH was good, but not the movie's sequel, so as a NIMH fan and a rather good fan fiction author, I've set out to right some wrongs and write what I believe to be the true sequel to The Secret Of NIMH, it will be called...
The Secret Of NIMH II: The Legacy Continues
The start of the story takes place only one year after the 1982 classic, Mrs. Brisby and her family are living a peaceful life and the rats of NIMH have gone to Thorn Valley - only to find that Jenner still lives and he intends on finding the stone and hunting Mrs. Brisby down, upon finding this out, Justin warns Mrs. Brisby and tells her of Jenner's intent, he hands her the amulet and tells her to get to a place where Jenner wouldn't be able to harm her, she and Jeremy fly to Thorn Valley and end up getting engulfed into a portal which takes them through space and time, from 1968 to 2010, there, a new character is introduced,who,you ask? I'm not going to say at the moment.
I've already completed Chapter 1 but I plan on completing another chapter or two before I upload it onto Fanfiction.Net or maybe this site perhaps.
So I assume you are making this in the same way you would an RP? Or are you writing this independently?