Not to mention that the Klingons would probably have more influence on the Federation immediately after the war than ever before. They had saved the Federation's bacon, after all. They could make all sorts of "reasonable" demands and expect them to be met.
I think it all would mostly depend on the wormhole, though. If it still works, any territory close to Bajor would be strategically important to all players. If the Prophets continue to ban all traffic, though (excluding Odo's mission of mercy and Kira's return flight), then both Romulans and Klingons would probably have much better targets for conquest than the ravaged lands of a has-been enemy far away from their home territory, and would readily use their de facto positions on former Cardassian turf as bargaining chips, buying until the last chip was gone.
I tend to agree but I think the Klingons wouldnt have too much power, I thought at one point they mentioned it would take the Klingons at least a decade to recover from the war (having taken the highest losses).
I also think once the Romulans had gotten territory there would be no way to get them out.