The Wormhole wrote:
Well, the Expanse won't, er, well, expand, but everything else in that timeline like the existence of the Enterprise J or the Klingons eventually joining the Federation should continue to happen.
The ships in that version of the 26th century were likely designed to work and fight in the Expanse. There would no longer be a reason to design ships with that in mind. The Enterprise
-J without Sphere Builder influence could be radically different.