The war is not looking particularly great for Russia. Russia failed to capture Kiev, the largest, city, and the second largest, city, Kharkiv. Russia is also having trouble holding onto the Kherson Oblast.
However, Russia has troops stationed in Transnistria. Do you think Russia will try to use its troops in Transnistria to launch a second front for the invasion, forcing Ukraine to fight a two-front war?
Russian troops in Transnistria are like bottom of the barrel stuff, I very much doubt they would play any role in the conflict. That being said, I am confident that Russia will eventually capture Odessa, which would bring it close to the border with Transnistria. I think postwar, Russia would annex the country. If Gagauzia also declared independence and went along for the ride, we'd be pretty close to my ideal situation for the Black Sea region with a post-Soviet POD. Support for reunification with Romania would be rather high in Moldova as a result (I think there aren't that many people who are strongly in favor of an independent Moldova who are *also* anti-Russia and Europhilic.). I could imagine that Moldova would be forced to recognize Russia's claims, which would clear a hurdle with NATO and make reunification simpler. Moldova would be part of the EU, and importantly NATO, and leave Russia with an even longer direct border with NATO. But we would get to see Romanian reunification which is something I've always wanted to see.
Even if Russia doesn't take Odessa (which I doubt), I think Romanian reunification has become much more likely than ever before.