I think Capaldi will sell well, given that they only did one release on him, and it's a Doctor a lot of latecomers seemed to ask for pretty regularly. And I suspect Ecclestone will also do well if they have managed to nail the sculpt this time around, particularly seeing as how these apparently come with two heads, so if both are good folks can use one head on their old release, and one on the new, which might add an extra kick to his appeal.
As for Tennant and Smith, who knows what the saturation point is for Who, and I know both have seen two proper releases previously, but Tennant is always popular, and the last Tenth Doctor (series 4) they made shipped towards the end of 2015, and the last Eleventh (series 7) shipped mid 2015, so we're still talking six years already since the last time they put out new Tenth or Eleventh Doctors in 1/6. Big Chief has grown a lot since then, both as a company and in terms of quality, and collecting has a lot of buyer turnover, so I think they're on pretty safe ground with these personally. If less popular Doctors being made didn't derail the line any, then I don't think new versions of four quite popular Doctors will do them any harm, or be that hard to move in the numbers they need to be viable.
As for the Zavvi re-releases, how well, or not, they sell isn't Big Chief's problem, and I give BCS credit for being up front when those re-releases were announced that there would be new versions of all of those Doctors coming, so I doubt they will cut significantly into the sales numbers of the new figures. Sure some might grab the re-releases and call it a day, but I suspect the reason that BCS is working on getting the upcoming releases seen now is to point out that (possibly) better versions of these characters are on the horizon before the re-releases hit. That way at least people can go in eyes open when making their choices.
Wait and see how it all shakes out, I guess.
As for Tennant and Smith, who knows what the saturation point is for Who, and I know both have seen two proper releases previously, but Tennant is always popular, and the last Tenth Doctor (series 4) they made shipped towards the end of 2015, and the last Eleventh (series 7) shipped mid 2015, so we're still talking six years already since the last time they put out new Tenth or Eleventh Doctors in 1/6. Big Chief has grown a lot since then, both as a company and in terms of quality, and collecting has a lot of buyer turnover, so I think they're on pretty safe ground with these personally. If less popular Doctors being made didn't derail the line any, then I don't think new versions of four quite popular Doctors will do them any harm, or be that hard to move in the numbers they need to be viable.
As for the Zavvi re-releases, how well, or not, they sell isn't Big Chief's problem, and I give BCS credit for being up front when those re-releases were announced that there would be new versions of all of those Doctors coming, so I doubt they will cut significantly into the sales numbers of the new figures. Sure some might grab the re-releases and call it a day, but I suspect the reason that BCS is working on getting the upcoming releases seen now is to point out that (possibly) better versions of these characters are on the horizon before the re-releases hit. That way at least people can go in eyes open when making their choices.
Wait and see how it all shakes out, I guess.