Mr. Laser Beam wrote:
(If there are any technical issues that would *prevent* a BR release, I'm not aware of them. I don't think any 'remastering' would be required.)
Well, despite how the term has come to be misunderstood and abused, remastering simply means going back to the original master footage and printing directly from that for maximum quality and authenticity, rather than making a copy of a copy. Most DVD or Blu-Ray releases are digitally remastered as a matter of course these days.
If you're talking about whether TAS has the necessary resolution for Blu-Ray, it was shot on film, which is automatically high-definition. But an HD presentation might make some of the imperfections in the artwork, scratches on the cels, etc. easier to see.