Here are tidbits of info from ToyFare regarding JLU 2008.
We will be seeing 16 new characters soon, not including repaints/redecos. Here's what's been confirmed.
1. The Question
Lashina, Forager and Mantis will be part of a 6-pack with Mr Miracle, Superman and Darkseid (not a new version)
JLU will be a Target exclusive line beginning summer. It is yet unexplained what will happen to the foreign market.
2009 will most likely usher in more non-TV animated characters.
Thanks to ToyGuru and Airmax at AFI for the info.