Quote:
“Will other Classic Series come on Blue-Ray considering most survive on 16mm film copies?”
As mentioned above, you won't get much more resolution out of the film copies than the video source: there simply isn't any more information there. However, you would get substantial space savings: entire stories fitting onto one disc, even with lots of extras, making it more viable to release slimline box sets of entire seasons (or even entire Doctors) using just a few discs.
At a stretch, as long as the original 16mm film has survived, you could upgrade all of the film inserts in the series (mostly location shooting) to full HD. It'd be weird and distracting to go back and forth between HD outside footage and SD set footage. That's an incredibly expensive process to go through and the gain would be questionable.
If they do it, they'll need to find a way of marketing it to people who haven't already bought the DVDs, many of whom also bought the VHS tapes beforehand, because it's unlikely that huge numbers of fans will rush out to buy Blu-Rays when the image quality isn't that much better than the DVDs.