Some info on this is trickling in from 2Ch. Apparently it's quite a changed game. Some have said it should have been called ver 2.0.
Changes known thus far:
-3 buttons instead of 4, just like Daioujou. Bomb button doubles as hyper button.
-hyper mode time has been reduced.
-Kill enemies with laser and you get more points than with shot.
-When the autobomb triggers, all of your bomb stock depletes (similar to Ketsui DS)
-Combo doesn't cut off when you use bombs.
-Bombs increase when some as of yet unknown requirement is reached.
-Stage layouts, enemy positions, and other aspects of the game system are exactly the same as ver 1.5