In the latest Blu-ray from FUNimation with Shigurui: Death Frenzy, the company has included a new insert which lists upcoming high definition releases on Blu-ray. They have several upcoming releases with dates that we've known about but also other series with no dates that we haven't heard about. Their plans so far are:
Blue Gender TV/Movie Set - 4/14/2009
Tsubasa Season 1 Set - 4/14/2009
Dragon Ball Z: Fusion Rebon and Wrath of the Dragon - 5/19
Full Metal Panic: Second Raid Complete Series - No Date
Trinity Blood Complete Series - No Date
Basilisk - No Date
Origin: Special Edition - No Date
Gunslinger Girl Season 1 - No Date