Well, nothing yet indicates Sora being there. This takes place right after the DDD Secret Ending. At that point in time, Sora was back in the Realm of Sleep and we saw Riku bring Kairi into the room where Yen Sid and Mickey were talking. Plus they're the only ones in the picture.
Yeah... so that's why I'm thinking that Sora isn't in this, then. But then I wonder how/why the original summary for 0.2 talked about Sora and Mickey being the pair the conversation was about.
Either SE changed their mind (perhaps realizing that Sora is supposed to be in the RoS at that time), or maybe Sora will "secretly" be in the game?
I'm not putting too much munny on that last thought, personally, but then again... this is "the entire multi-verse resolves around Sora" series. So you never know, I guess. LOL.