I submitted the time for my latest 10K race (1:12). The response I got back is that my projected finish time has been updated to 2:42:00. Do you guys think this will be fast enough to get me out if the last corral?
Definitely out of the last corral! I submitted a 2:45 finish for last year's DL half and was in corral D. My guess is you will be in D, possibly C. This year for DL, I submitted a 2:23 finish time and I'm hoping for corral C. The corral times for Tink and Princess are a lot different since they are women focused events. Here's the clif pace team link for DL last year. This may give you an idea of corral times.

http://www.clifbar.com/blog/detail/disneyland_half_marathon_clif_bar_pace_team_course_preview/