The idea had crossed my mind, and the timeline of the "ancient artifact" lines up well enough. I'd also like to see the Romulan supernova addressed...

However, I'd actually prefer it to be handled by "Lower Decks", which is set in that rough timeframe.

Uhm, I don’t need the Romulan Supernova to be tied up with a bow.

But I also appreciate that writers like to be able to be the ones to bring closure to their own stories. Alex Kurtzman was the cowriter of Star Trek (2009). I can see how he would like to be the one to lay down the incontrovertible canon that ties the loose ends that the Kelvin movies and Picard have left us with. And he’s co Showrunner of Discovery so it was his vehicle to do it with.

So, I would be cool if this resolves some things and helps us to understand better the butterfly effect that destroyed a civilization, split the resilient Prime time and perhaps even give us some deeper hints on what caused the Mirror Universe to split off.

It doesn’t really need to.

There’s enough evidence with the shear amount of canon inaccuracies in Discovery, Picard S1 & S2, LD & SNW that they are actually set in the Kelvin timeline.

They can’t all be down to bad writing, a lot of them sure, but not all.

The whole premise of the supernova in ST 09 was the product of terrible writing.

“A supernova that threatened the galaxy.”

That’s simply not how supernova work.