UPDATE: I just changed the ending of Sonic's True Origins, which reveals that Sonic.ERR is the true leader of the League of Sonic.exes.
I'm also planning on making two more episodes for UnAnything: The Series, which are:
Attack of the Sonic.exes is the sequel to Sonic's True Origins, while Woody's Nightmare is about Woody from BFDI having a nightmare, which takes place during BFDI: TPOT 2.
EDIT: Woody's Nightmare has been finished!