The wormhole would not have been discovered because the Emissary would not have been there to do so. In this timeline it would be another individual at perhaps a future date. Maybe the Prophets would have manipulated Jake’s conception and it would be him twenty years later, if the Sisko DNA matters.Why does no one ever envision that Bajor can develop and flourish on it’s own without external interference? It is a shame that the Vulcan’s were not around to make first contact with the Bajoran’s after they made their first successful warp flight using the solar sail ship. Maybe the Vulcan’s did see them and detect their warp signature but chose to ignore it? Or perhaps the Bajoran’s beat them to it and had no one to greet them after achieving this milestone because they got there first? The Vulcan’s might have been too busy dealing with the Romulan uprising at the time, with all of their space resources focused on relocating those who did not follow Surak and his teachings to Romulus?
The Tzenkethi might have just kept themselves to themselves as they are not exactly a major player in galactic affairs? I know that they had a brief war with the Federation but I think it was a bit lob sided with the Federation having the upper hand. If the Tzenkethi *did* help Bajor, why would it have to lead to a defacto conquering? Can’t two or more species cooperate and build things together without any untoward agenda? Maybe they made a coalition together and the Bajoran’s helped to spread spirituality to the Tzenkethi, with both species eventually joining the Federation?
As for the undiscovered Bajoran wormhole, perhaps the Dominion discover it first and send Changelings from the Gamma Quadrant through to the Alpha and Beta Quadrants on undercover infiltration missions?
I think that the Alpha Quadrant species would have ended up discovering the wormhole eventually because eventually they would have picked up it’s neutrino emissions as/if it was being used frequently by anyone else?
Bajor might have made it without help, but at a far slower rate. They’d be a single planet for decades trying to rebuild themselves. Help would get them on multiple planets & moons nearby and access to interstellar markets.
The Tzenkethi are nearby. As are the Talarians; I nearly said them but I think the Tzenkethi are more sinister. But the point is not that Bajor is useless by itself but that the nefarious Tzenkethi would utilize at the opportunity to gain an advantage over their rival Cardassians.
The Dominion was going to interfere with the Alpha Quadrant, but in this timeline/universe it looks like they could blow themselves up so they don’t need to do much more than watch the tragedy (to them a comedy) play out.
That is until the end of the millennium, when as Centurian Bochra put it in TNG’s “The Enemy,” “the Federation is extinct and the Romulan Empire spans the Galaxy.” They’ll have to do something about the Solids before it gets that far.
Though, they won’t. Because everyone will be assimilated when Voyager isn’t in the Delta Quadrant to destroy the transwarp hub.