As for merchandise saturation while at WDW during our last trip, I'd have to say it was all about Hannah Montana and the High School Musical franchises. Wall-E was still over a month out.
The only thing I remember about the trip when it came to movies that were out or close to coming out was HSM 2. And how much that was all over DHS last year with the parade and stuff.
July 2006 was all about Pirates, Pirates and more Pirates. I am hoping to see lots of Wall-e stuff in a couple of weeks. DS loved the movie, but we haven't been able to find much stuff around here yet.