Other than Original Sin 2 being technically and critical successful, part of the reason they were tapped to make Baldur's Gate 3 is because of the DM Mode and Toolset that Original Sin 2 uses; to my understanding at least. When you factor that into the fact that Original Sin 2's engine is being used for Baldur's Gate 3, it seems to me the more that I think about it, that a DM Mode and Toolset will be released eventually. My guess is it will come with the full launch if at all, but it's possible it could even be its own DLC. A lot of the hype for Baldur's Gate 3 is centered around making it feel like a real D&D game, and including these tools would be a critical component for that. Furthermore, D&D has never been more popular in its over 40 year lifetime than now. Further-furthermore, Larian is not known as a half-assed developer, but instead as one who really listens to what its players want within reason, and is eager to put out the best product possible, which is actually relatively rare. Most developers are interested in putting out the best product within a willing margin.
For these reasons, to reiterate, I think a DM Mode and Toolset is more likely than not (but not certain). However definitely not until at least the official release.
All of that now being said, I desperately, desperately want them to allow us to have as many people connected to a server as the server host can handle, and allow for multiple parties within said server. Many people are not familiar with what the hardcore NWN playerbase was like, but consider something like World of Warcraft the best model. There were hundreds of NWN communities with over a 1,000 members each, who had servers that were up to 55/55 players online at all hours of the day. DM's would run events and long term plotlines. The ability to create our own miniature MMO's and manage a our own worlds with clear storylines but with much less distance between players and developers than huge MMO's is something that has never existed outside of NWN1 and 2.
