Maybe it will open at 9:00. Here's what I found on Deb's site:
NOTE: Since September 2003, Adventureland's opening times have been based on anticipated crowd levels.
February 22-28 -- Sunday, Monday, Tuesday, Thursday, and Saturday: 9:00am; Wednesday and Friday: 10:00am
February 29-March 6:
Sunday, Thursday, and Saturday: Adventureland opens at 9 a.m.
Monday, Tuesday, Wednesday, and Friday: Adventureland opens at 10 a.m.
March 7-27: Adventureland opens at 9 a.m.
When Adventureland opens at 9 a.m. the attractions available are: Pirates of the Caribbean, The Magic Carpets of Aladdin, and the Swiss Family Treehouse.
Guests who enter Adventureland wishing to walk to Frontierland from 9 a.m. and 10 a.m. will be redirected there through the Adventureland Breezeway.
Here's the link.