I have faith in them getting the main game done as they have a lot to show for it, but I do wonder if Tribunal and Bloodmoon will be done, and I hope they will. Right now those are "ifs" in regards to the project, and likely require the same reforming that the Skywind project had by making all of the armors modular, having to recreate two more major locations, have it all fully voiced, etc. I can't speak to the volume of those expansions in regards to the original game, but I assume the current bar they're aiming for make them much more time-consuming to accomplish. Skyblivion, to contrast, will probably have all of its extra stuff done, as they've said the intentions are the main game, then the smaller DLCs, then the expansions, and then newly made DLC just for this version of the game. What makes this project somewhat easier is by requiring the mod to validate your copy of Oblivion, they can port over the audio, so they get away from the huge task of having to rewrite and narrate so much.
Beyond Skyrim, a project only really connected with this because they share similar assets (primarily between the Skyblivion and Beyond Skyrim Cyrodiil projects) might keep going ala Tamriel Rebuilt, but I think the window and interest in game-specific remakes/remasters has a time limit in that when TESVI releases, I think the idea of "the older campaign in the newest game" just moves one more game forward.
