It reminds me what Iger said when Disney bought Lucasfilm.
Originally Posted by Bob Iger
We didn't ascribe any value to the Indiana Jones franchise because of the encumbrances that exist.
Guess he really meant it word for word.
That being said, Lucas wasn't exactly much better with the franchise. He once said "I don't care" when asked if he was developing Indiana Jones 5 before Disney bought it. And of course, we all remember how needlessly long we waiting for Indiana Jones 4.
I guess when you take away our emotional attachment to the series as fans and look at it as just a business, it makes sense to focus nearly all of your time on a franchise where its installments make a billion dollar just by merely slapping a logo on it.