Enemyofmany
Super Freak
I think you're right, but of course, we don't know how much that Batmobile will cost. I don't know if the Tumbler is a good reference point, because it was initially produced awhile back, then re-released, meaning for the re-release they could cut down on R&D costs being passed on to the buyer. I suspect it will cost more than the '89 Batmobile did (over $600) because it's a comparable kind of piece, and they will add in inflationary costs. I will guess $650-675.
It's difficult to speculate at the moment. I'm not sure whether or not it'll be more expensive than the 89 Batmobile only because the DeLorean is smaller.