I still don't think it's a direct tie in. Rinaldo exists in LoS's universe, as he does in LoI/IGA's universe. No one said they had to be the same guy, but dimensional counterparts. Other than a few references to other CV games, I didn't see anything LITERALLY referencing the events of IGA's canon. And some claim the end takes place in 1999. After watching the stream, I don't recall the date even popping up on screen. It just took place in "modern era". There was no references to the Demon Castle Wars, or references to any other of the Dracula/Belmont struggles from LoI-PoR. For all we know, in LoS, Gabriel "disappears" from history, and hides away from centuries until Zobek tracks him down in the modern age.
I really DO think people are reading too much into this.
As for Gabriel being Dracula, I think it has as much standing as the whole Mathias is Dracula thing. I wonder who the "Vladd III" people are going to react to it, because seemingly, since CVI, they've been clamoring that CV's Dracula is the historical "Vlad Tepes", and this one shuns that theory as well. Actually, as I stated in the other thread, I actually like Mathias as Dracula more, because he didn't get strung along like Gabriel did. Mathias had a clear objective, and used people to achieve it. His means of becoming Dracula was very sisister and evil, the puppet master who used Walter, Leon and Sara to achieve his goal. Gabriel was being strung along by Zobek, who was being strung along by Satan. Way to be the puppet, Gabriel!