3 1/4 inch scale is the theme this year it seems with retailers in general and there is a whole slew of DC superheros coming.
Mattel didn't really have anyone available to talk to about the Collector lines so I don't have specifics. There where some 6 inch scale figures in the mix...
... as well as larger 12 inch scale versions of characters.
DC fans should be pretty happy sculpts on all the different scales looked great.