Plus - I have noticed Disney's focus turning almost 100% to families with kids who are not in school yet - they have a lot longer travel window - and the school year aged kids can only travel during times of the year where the park is already packed.
I really don't think that is true at all.
I think all of the expansions/changes have shown that Disney parks are focused on an immersive experience for the whole family.
Avatar probably geared more toward teens and young adults.
Toy Story is geared toward younger kids but remember people who are now in their 20's were kids when the first movie came out. They will feel a strong connection to the theming of this area over the next 5 - 20 years.
Star Wars is a great mix. Young children always seem to be drawn to it for some reason. Teens and young adults are super into Star Wars with the new shows and movies. People in their 30's to 60's pretty much grew up with Star Wars as hugely important to the culture during most of their lives...
Disney parks have always been a mix of stuff for young kids, family attractions with a couple of thrill rides sprinkled in and nostalgia for the older generation. That doesn't seem to be changing...