Different plays are not in continuity with each other.
I'm talking about different productions of the
same play. Remember the controversy about the recent production of
Julius Caesar that costumed their Caesar to look like Trump? Years earlier, they did it with a Caesar who looked like Obama. Many different productions of that play have updated its sets, costumes, casting, etc. from Ancient Rome to something that paralleled their own modern times. But they did not change the words or events of the play. The actual
story remained unchanged. The characters were the same, the sequence of events was the same, and the world they inhabited was the same in substance even if it looked superficially different. (That actually bugged me about the David Tennant/Patrick Stewart BBC production of
Hamlet that was updated to a more modern-dystopia setting. The stage/video direction incorporated security cameras everywhere, ubiquitously watching, to create the feel of an oppressive surveillance state -- but the script was unchanged, so the characters were still relying on hiding behind arrases and eavesdropping on each other. Some changes fit better than others.)
And it doesn't matter what they "make clear". Either it will be consistent or not.
And it will be consistent in
story, which is what actually bloody matters.
Star Trek is not just a series of images.
Their say so has nothing to do with anything.
Of course it does. It has everything to do with whether future Trek creators will consider this show to be part of the same integrated universe with TNG through ENT. There were fans decades ago who refused to accept the TOS movies as part of the same reality as TOS itself because they looked different. There are still a few such fans today. But their opinions have no bearing on the actual shows and films, because fans are only spectators in all this.
You know I was thinking about this canon issue and their might actually be no way to every really answer the question for sure simply because nothing that happens on "Disocovery" can ever impact any of the other shows.
That's been true of most new incarnations of Trek. The events of TAS and the movies couldn't change TOS. The events of TNG and its sequels couldn't change TOS, TAS, and the movies. They can retcon their events, change our understanding of them. The original version of those events remains unchanged, but we filter them through an altered perspective and that changes our view of how they fit into the universe. This is normal for series fiction.
It's not like Burnham might someday show up in a TNG episode or we can't ever see a flashback scene on DS9 where we see starfleet people wearing the new uniforms. Can something really be canon if their is no way to connect it to the other stuff beyond what we imagine in our heads?
"Canon" is not a fixed and unchanging thing, unless it's the canon of a series that's permanently ended. An ongoing canon is constantly growing and evolving as new installments are added to it. TOS's canon changed rapidly throughout its first couple of years as the writers felt their way towards figuring out what the show's universe and characters were like. The movies and later shows added new understandings and angles on the growing and evolving canon.
And there didn't have to be retroactive crossovers for the new parts of canon to "count." We accepted the movies in continuity because Khan appeared in a film; we didn't need them to go back and edit the young Saavik into TOS. We accepted TNG into continuity because it referenced events from TOS and gave cameos to McCoy and Spock; the new show told us how it fit together with the old, and that was enough for us to accept the continuity, with no need for TOS to be altered. The only thing that needed to be altered was the
context in which we placed TOS, our view of the larger world that it inhabited. Every other new show has recontextualized TOS and its other predecessors in the same way.
Discovery will be no different.