The only issue I can see with this approach is that it implies too much public knowledge of Luke (and implicitly the Jedi). At this point in time, the Jedi are supposed to be believed to be long dead, fallen into myth, and Luke’s absence is only impactful to those who knew of him- the OT cast and their close allies, and the most senior Sith.

I think it can be the triggering incident behind the return of the First Order at a stretch, but I don’t think it should cause New Republic chaos or its government’s response.