Always remember....Disney management is arrogant. But their arrogance causes them to often make poor long term decisions. If Universal didn't experience a rebirth starting with Potter, there would probably only be a small SW land
around Echo Lake, no Pandora, no Mickey RR, no Guardians, no Toy Story Land, no Tron and a much smaller New Fantasyland comprised mainly of M&G's.
Disney may well have never bought Marvel... or Star Wars... or Fox - if it wasn't for Potter. A lot of why they bought all of that was because they realized they didn't have enough adult content or they didn't have enough male skewing/geek content. That's literally why Tron: Legacy got made in 2010. It was Disney's attempt at a sci-fi franchise at a time when they didn't have any of their own.So - thanks Universal?
Potter wasn't the only reason they bought those of course, but they wanted male skewing content for the theme parks just as much as they did for theaters and I think Potter kicked Iger into high gear to go on a spending spree.