Although none of the pavilions in World Showcase are open until 11, the only part of World Showcase that is completely off-limits to guests in the morning is the section from China to France. The section from Future World to Norway is open so that people can get to and from the Princess Breakfast at Akershus. The section from International Gate through UK and Canada to Future World is open from 9 to 11 for guests who enter at International Gate. I believe you can even enter at the International Gate to go to the Princess Breakfast, but I'm not sure about that, and would recommend asking before trying that..