>>111637777>>111637576From what I gather, it seems Jhonen is the kind of person that, once he works on an idea, or makes it public, he's done with and over it. I don't know what took to make him recycle the first issue for the intro of Enter the Florpus. Other than the fact that it fit so well.
But he might still have some lingering hope of a revival of the show or at least of making invader Dib some day. So he's not going to use the characters and plots that he will need to bring back for that in fear that whatever he does with them is too similar to the planned series finale.
Or maybe, he doesn't use the plots and characters because he's has registered in his brain as already having worked in it and that people know about it and is, therefore, done with them.