Well, the ability to understand what is written always helps for things to make sense.
Let's look at what
@WDW1974 really said:
The word "most" does not mean exclusively - which you try to make it out by using the word "just":
And by changing that one word, it is quite easy to explain Carsland and Avatar: As long as they feel that they have enough for the main demographic they are after, they are then trying to round out the offerings for the second rate demographics (families with little boys). Especially taking into account the first part of the sentance, that they fear it ONLY attracts fanbois (and I think with that they think of single males in their 20s), this is a demographic that certainly is not ranking as second tier, but as a tier that is not even on their mind at all! In the thinking that
@WDW1974 mentions Avatar might even be the reason for being hesitant towards Star Wars as it would be considered too much the same. Can't have two things that are considered to be more "male" and grown-up in their appeal happening at the same time...