That same year, The Magestic was screened. It was the theatrical print but it had just been "locked" (no more changes) 2 days before the screening (that is probably about as wet a print as you can get).
Everyone knew that ROTK would be screened (and it made sense for Peter Jackson to attend, he had filmed a BNAT intro previously). Harry has been interested in seeing The Passion and it is one of the most anticipated films this season. I think from the way the list was printed, that ROTK played early in the program. The Passion was a curve that the audience was not expecting and the live Q&A from Mel was unexpected too (although special guests at the theater are a standard surprise).