Currently being produced is the sequel to the Lucky Star anime series, Lucky Star OVA.
It’s kinda obvious from the cover picture though, but speculations from other sites [ Sankaku Complex] say that it’s gonna go all out on cosplay. The basis, is because the official site, lucky channel, has released a series of development/concept artwork.
idk the cosplay in the center, but the bottom most image should be really obvious as to whom is cosplaying who.
As for the release date, you can look forward to it being released in Japan, late September (September 26, 2008). [Lucky Ch]