I agree that $450 is a ridiculous price point. Depending on what's in it, it might have value for the money (for example, if the miniatures are metal instead of plastic, that's about $150-200 of minis), but dropping half a grand on something sight unseen? Not unless I suddenly become rich enough that I wouldn't notice the loss of $450.
I mean, the most I've paid for a single RPG product was $200 (+shipping) for TORG Eternity, and that was a HUGE box, with three hardback books (rule book + two adventure compilations), a GM screen, a poster map, a bunch of cardboard tokens, specialty dice, specialty poker chips, almost 200 cards, eight "table tents", a pad of character sheets, a CD with a soundtrack for the game, as well as PDFs of all of the above + all the stuff for old-school TORG. But that was for a product I knew I'd love, and where the producers had plenty of previews along the way showing what was in it.
But for Dragon Heist Platinum, the price point is twice that, and the company in question are essentially saying "Trust us, it will be full of awesome stuff that we can't show until it's released and by then it will be too late." That's not good enough.