The blog just announced January 1st is the last day for Block Party Bash.
New Parade Coming to Disney?s Hollywood Studios Disney Parks Blog
Not much new info, but Remy, Emile, Carl, and Russell will be in the new parade. Also, I've read rumors they are using the Pixar Play Parade music from DCA and the tentative title: Pixar Pals Cavalcade.
New parade starts January 16. Hopefully it will be completely new!