I like the idea of starting off with a rec fest to get us all in the mood and then a fic writing fest with prompts and a specific time frame. After that the comm could be opened up for posting or linking other fic. Monthly themes or prompts would be nice as a way of inspiring new fic but the comm would also be open for whatever.

If there's a fic fest I'd really prefer that each fic get its own post rather than go in comments. I find reading fics in pages where comments have collapsed to be a pain, and I like that with separate posts we can tag everything by fandom and that will make fics easier to find later.