Why couldn't they at least bring back the Trooper or the Anaconda?
Well that would be a good idea on one condition: that those revolvers were intended to directly compete with S&W and Ruger. Colt isn't IMO capable of making DA revolvers that are substantially better than whats already out. Keep in mind that they've been out of that DA market for a while, and in that time the competetion improved their processess steadily. Colt would be starting over and unless they could make the anaconda and ask as much as say a Redhawk or S&W 29, its not worth doing.