I'm not sure if I can post this here, or if it'll serve any purpose for anyone here, but I'll still try my luck. Yesterday, in a conversation with @Jmtshaw on Discord, came to me that in the Sonic Adventure Music Experience 2016 a presentation was made regarding the Saturn Project that came to be Sonic Adventure. A couple images were added to SA1's Development Section, a few days ago, showing a few concept images of said project: The one who snapped those photos sure must have been brave, since photos and recording were forbidden. According to this article from SEGA Nerds, those images were displayed while the composers explained that they had to compose tracks for the game by just checking said concept images, so it's quite likely that not much in terms of playable characters, plot and gameplay had been talked about at the presentation. However, from those few images, one may see that stuff like the Beta Windy Valley, the Tornado part, Mystic Ruins and maybe even Angel Island, Red Mountain and Lost World might've been in mind since the very onset of the project. Unfortunately, I couldn't find much more about it. I'm making this thread to expose these tidbits to whoever, like me, may have yet to find out about this, and to possibly pick up interest from any member here that might've been at the event itself and could have something else to add to this matter. I sure hope this thread helps someone.