so there's something to speculate on for series 3 there.
I'm not so sure that short will have anything to do with S3.
Zora states that her crew left 1000 years before and that she spent most of that time evolving herself. Clearly, that's not a vessel that jumped 950 years through time to the 33rd century. Also, that the sole remaining warp-capable shuttle had been delivered just before the crew left, which doesn't match anything we know about
Discovery as of the end of S2. Despite what Memory Alpha and just about every other Trek site on the web says, there is nothing in the short itself to indicate it takes place in the 33rd century; as far as I can tell, that was an assumption based on the current series being set in the 23rd plus Zora's thousand-year wait.
So, who's to say that
Calypso doesn't take place in the 43rd century and we won't actually see any of the events such as the 10-year long war between Craft's people and the V'Draysh?
Hmm, what if, instead, S3 ends with the crew having to abandon
Discovery—which has begun incorporating the Sphere data into an evolving consciousness—in the 33rd century, with a promise to come back for it some day, while they return to the 23rd (or whatever) century? That would allow Georgiou to appear in the upcoming Section 31 show without it being set in the far future, which would make little sense. Then S4 could have a newly commissioned
Discovery without a spore drive and all the stuff that had to be sent into the future to keep it out of Control's hands.