is there a christmas-themed anime movie?
It's not a movie exactly, but at only 6 episodes Mobile Suit Gundam 0080: War in the Pocket is roughly movie-length. If I remember right it doesn't require any prior knowledge of Gundam, either. It's not exactly Christmas themed, but as I recall it takes place in December and there's Christmas decorations and stuff in the background of some scenes.
A bit of a stretch, I know.
1 LN volume is not equal to 1 manga volume is not equal to 1 anime season. So…open to ideas on that one.
I was going to suggest a certain number of chapters, but it occurs to me that 1 manga chapter is not always equal to 1 manga chapter; manga from monthly magazines tend to have much longer chapters on average. Anyways, I think 1 discussion thread for 1 volume of manga per week is a good pace. Since it's a smaller community having a lot to talk about at once might help to make the discussion threads more active.
I think a good candidate series would be something short, but with good ratings overall. Most of my favorite manga have at least 10 volumes though so I dunno.
I'm two episodes from the end right now, and once it got past the slow start this show was really excellent!