I don’t see any way Russia maintains any significant presence or influence with the new Syrian gov’t, given how directly involved they were in the war. Guess it depends on who comes out on top in the new power arrangement, and how many higher-ups from the previous regime are allowed to stay in office and how much influence they actually wield.
More investing will be seeing how Iran reacts. They’re obviously pissed about losing one of their big strategic partners, and this means big trouble for Hezbollah too. It wouldn’t surprise me if they try to bump off as many of the senior, Western-leaning leaders in the new government as they can over the next month or two.