If you think this is the only Doc Brown they will release you are wrong (bold statement I know) I think we sometime use this as an excuse to purchase something we are not totally convinced on. This line is selling well I would say. You wouldn't invest in the tooling required to make an entire 1/6 scale car, let alone pay out for the licences to only produce a very limited run of one character. We thought BTTF Marty was going to be " the only" BTTF figure we got. Then a year or so later its announced we will get BTTF2 early costume Marty and BTTF2 early costume Doc. We then get teased 1950's BTTF2 Marty and Doc. From what I have seen this figure has almost intentional flaws, such as not having doubled jointed elbows, a limited posing expression and a far too youthful appearance. Hot Toys are not silly, they know the definitive Doc Brown is the radiation suit version and so that will be released after all other versions in order to sell as many figures and get their moneys worth out of the licence.
They rely, in part, on us believing this will be the "only" version of the character and so buy it under that pretence we wont get another. All that being said though, I do really like this figure, but having just bought two Blitzway Ghostbusters, I just cant justify another 220 GBP on another figure at the moment, however I do really like this figure and slightly jealous I cant get him! I' am worried though that they will do figures from 1885. My bank account will take a total pounding if so. Doc and Marty in western attire...just take my money!!!