I concur with the Ghibli movies and The Girl Who Lept Through Time. I own TGWLTT on blu-ray if we are able to get our hands on a blu-ray player for the con. I would be happy to bring it.
I also would LOVE to see the Macross F movies, Pokemon, Digimon, (The Japanese movies are interesting to watch compared to the mashed up North American movie, and nostalgic to boot.) Sacred Star of Milos - FMA Brotherhood, The Gundam 00 movies, Trigun Badlands Rumble, Akira,
If any episodes of series are going to be shown I'd recommend Tokyo Magnitude 8.0, HELLSING (The OVA's, since one of our fine guests voiced the main character), Card Captor Sakura if we can get our hands on it, or at least the second movie, The Tales of Symphonia Animation.
I could go on haha, but those are my two bits. =)