Hmm. I could buy into that if Incredibles 2 was only available in theaters that were located between Ventura and San Diego. But Incredibles 2 opened in theaters last Friday in all 50 states, plus Canada. DCA pulls in on the busiest of days 40,000 people per day. Even if every single person that went to DCA this past weekend then refused to go to the movies, that's a drop in the bucket compared to the more than 1 Million people who just paid for a ticket for Incredibles 2 this weekend from Maine to Oregon and from Idaho to Florida.
Again, even if you had a rule that said that anyone who went to Disneyland Resort that weekend was then forbidden from visiting any movie theater showing Incredibles 2 from Ventura to San Diego the same weekend, I can't imagine you'd even make a noticeable dent on DCA attendance for the weekend.
The late opening date aside, there seems to be a missed opportunity to tout the new Incredibles E Ticket with a featurette during the showing of the Incredibles movie. I don't think playing the lazy Pixar Pier commercial they slapped together with three year old B Roll footage that shows nothing and some Intern-created CGI art shouldn't count as "Synergy".