I've been involved with ressurecting an online RPG that was cancelled. The fans pooled together and recreated the game plus unreleased content the developers never got to.
With enough fan passion we could create a script (if there is no official one we can get our hands on) and hire an artist to do the art. Seeing all these ideas already gives me hope, peace, and closure if the worst scenario comes to pass with the manga no longer continuing to the end.