you have about as much information as i do about trizeal. it was released in japanese arcades on naomi hardware. supposedly plays like raiden. the impressions i've read have been pretty negative, but i want it anyway.
gigawing generations is a new game. unlike the first two, it uses a vertically-oriented monitor. arcade version runs on taito's pc-based type x hardware, and i remember hearing that the graphics are poor. i don't know if i'll buy it at full price...i'm not a gigawing fan.
anyway, the shooter to look forward to is psikyo's dragon blaze, which is coming to ps2 early next month. if i'm not mistaken, it was their last arcade shooter, and it looks absolutely phenomenal. it comes bundled with sol divide, but the less said about that the better.