One key piece of information that was revealed today was that you'll need an account on the Disneyland website, so if you don't currently have one and plan to be going after a reservation, you'll want to setup the account soon so you won't have to worry about it later. Since the Disneyland website will likely be a hub of activity as people try to make reservations, you'll absolutely want to be sure you don't have extra steps you'll need to complete. Also, of course, you'll need to buy valid theme park admission to get into the park at all.