In cold reality I believe the focus of WDW is on any adult with the cash, credit or borrowing power to churn Disney revenue. But I'll give ya FLE but unlikely Avatar will be focused on young kids.
As hard as I can take Disney to task I can't say I agree with this statement focus on young kids. Yeah they have dumbed down some attractions but the premise that goes back to 'Families Together' and that was DL & MK, but I can't say it is for young kids, way too much within DL and MK that young kids are not even tall enough to ride. The other 3 parks and DTD along with the waterparks are as much for adults, pre-teens, teens and then areas for young kids for inclusion.
The majority of restaurants that are not 3rd party are themed to adults and even some of the 3rd party venues. Most of the bowling alley is themed adult and certainly most of the places like Atlantic and Jellyrolls can't be focused on young kids. DVC are focused on adults.