It would appear from these screenshots that a Casino Night inspired Zone is going to be in Sonic Lost World. The screens were posted by SSMB member Gatestormer on The Sonic Stadium Message Board a short while ago and appear to show a new unannounced zone for Sonic Lost World. No name has been given yet, however long term fans will instantly recognise what it looks like. The Zone appears to borrow heavilly from the Sonic 2 stage Casino Night, with the pinball section and even Casino Night badniks.
Check out the rest of the images in our gallery.