The original Disney hotels did not 'have themes'. The Polynesian Village Resort had a theme, the Contemporary did not have a theme, it was just the mid-century modern hotel, while we were in the Mid-Century. It was the epitome of Brutalist architecture, when Brutalist architecture was the rage. The next hotel was the Disney Golf Resort. Again, a themeless Mid-Century lowrise. This was followed with more brutalist architecture at Hotel Plaza.
They did not try themed resorts again until Caribbean Beach Resort and Grand Floridian Beach Resort.