Treasure Planet will probably be "Prem-ear-ed" on our 11/30 sailing. My guess is that it will be shown in the Walt Disney Theater on Tuesday night when there is no regular show there.
Harry Potter and the Chamber of Secrets will not be shown on our sailing. It is a Warner Bros. movie and only first-run Disney films are shown. I know Harry Potter and the Sorcerer's Stone started playing on the ships in Late March or Early April...about the same time it came to those pay-per-view services some hotels have and about a month or two before its video release. The only newly released films shown onboard are Disney Co. films (Buena Vista, Touchstone, Hollywood Pictures, Miramax). Others are shown on a second-run basis.
My guess for the movies on our sailing is...
Treasure Planet
Santa Clause 2
Tuck Everlasting
Sweet Home Alabama
My Big Fat Greek Wedding
Signs
and possibly still Spy Kids 2 and Lilo & Stitch
Hope this helps.