Damn it, Madhouse! The world doesn't need another harem anime, just give us Ippo!
New original mech series from Sunrise should be fun, though. There's also another romcom by Brains Base, that might be a nice watch.
Aku no Hana's director was the director for Mushishi and Detroit Metal City, so we can probably safely expect good things from him.
That's all I see that really seems to stand out, since I don't give two shits about Higurashi and the movies won't be out of the theaters for another year, or something.
Also, I think Uchuu Senkan Yamato 2199 belongs in the OVA section.