If Colt was making new DA revolvers in the $1400 MSRP range, they'd be competing directly with the S&W Performance Center products, not the regular production catalog. Even then they'd be on the high side.
While the wheelgun market consists of very determined customers, it is just not a huge market. Prices of even a pedestrian regular production revolver ends up running somewhat more than the popular poly framed semiautos, and that's where much of the firearm market goes.
I think it's not so much that there's NO market, but that Colt doesn't see ENOUGH of a market to do it. If they make them for even $2000 and generate a profit on those, is it enough of a profit for them to even bother with it?