The Disney Parks Blog confirmed that the Move It! Shake It! Celebrate It! Street Party will receive updates and a new name: Move It! Shake It! Dance & Play It! Street Party.
The updated parade will include new music, new characters and new ways for guests to get involved in the parade. Stitch and Phineas and Ferb will be added. Mickey, Minnie, Goofy and Donald will appear atop giant gift boxes on each of the floats.
Given start date was listed as "this fall", however WDWMagic.com is reporting that this update is expected to occur in October.