Cool to see the concept suits fleshed out a bit. Joe Quinones (the artist on the recent Batman '89 comic) designed elements of some of these, and artist Chris Weston did, too. The gray costume was Weston's idea.
I'm sure I'd buy them if Hot Toys spaced them out a bit, but I won't be too upset if they're not made. (They'd be instant purchases from McFarlane...) The Batcomputer Hot Toys teased is much more up my alley, so I hope that one comes out (with a turtleneck Bruce and Alfred please!). The cool bases definitely make these figures more interesting, but I'm not up for rebuying an '89 and/or Returns suit just for the bases, as I'm perfectly happy with the original releases. I'd also want to show those off with Keaton sculpts rather than as empty suits. Emphasis in my collection will never be on The Flash over Batman, no matter how good the movie is.
Like some of you have said, my goal is also a Batman from every movie, but I'd love figures even from the original serials, too! If done in black and white, they would really pop on a shelf. No chance of Hot Toys making 'em, but that doesn't stop me from wanting them made.