Would it have been possible for the Klingons and Romulans to swap roles in TNG? This is assuming that, for the sake of the question, the events relating to the Enterprise C are inverted - where the Federation responds to a distress signal from a Romulan outpost under attack by Klingons, they intervene, and fend off the Klingons. This would take place in an AU where the Klingons had a "Klingon-Federation" war, with the creation of a Neutral Zone, whereas the Romulans would be an aggressive rival, replacing the Klingons in the various Klingon-Federation conflicts.
This would result in a sequence of events where the Romulans make peace with the Federation (creating the Romulan-Federation alliance) after the Enterprise C incident. Worf in this idea could be Romulan, rather than Klingon (but not sure how the whole "Honor" Element, his family history, etc could be translated to being Romulan), with him being the first Romulan to serve in Starfleet. Or would Worf still be Klingon, and be disowned by the Empire, who is far more aggressive, and views the Federation with far more hostility, suspicion, etc than in the Prime Timeline? What would be more interesting?
When the Klingons "Reveal" themselves after decades (like how "nobody saw a Romulan Ship for many years by the TNG Timeframe), Worf would be seeing a Klingon Ship decloaking for the first time in his life on screen.
This would result in a sequence of events where the Romulans make peace with the Federation (creating the Romulan-Federation alliance) after the Enterprise C incident. Worf in this idea could be Romulan, rather than Klingon (but not sure how the whole "Honor" Element, his family history, etc could be translated to being Romulan), with him being the first Romulan to serve in Starfleet. Or would Worf still be Klingon, and be disowned by the Empire, who is far more aggressive, and views the Federation with far more hostility, suspicion, etc than in the Prime Timeline? What would be more interesting?
When the Klingons "Reveal" themselves after decades (like how "nobody saw a Romulan Ship for many years by the TNG Timeframe), Worf would be seeing a Klingon Ship decloaking for the first time in his life on screen.