To be fair, the countdown page is very reminiscent of the Chrono Trigger opening screen, and the sound effect of the ticking clock, as far as I can tell, is the exact sound from the game. So, even if it hasn't officially been confirmed yet, it seems like a foregone conclusion at this point.
I really, really need to know more details about this. I'll probably buy it anyway, since it's Chrono Trigger, but still.