I'm going to be the killjoy and say "No". Then again, I have no idea where IGA was going with the time travel aspects, so I could very well be wrong.
Aside from that, I don't think there was much indication he was planning on doing something like that. There's Cornell's suprise appearance of course, but I think there are other ways of explaining that. Personally, I think IGA pulled a Lords of Shadow and put his own version of the character in Judgment. That way he could still have a werewolf character in his fighting game, while Legacy of Darkness still remained a gaiden.
However, that's not to say he couldn't have humored us at some point by going all-out and putting characters from various continuities in one big crossover. But maybe in that case it would be just simpler to say: "This character is from universe A, and that character is from universe B", and keep these universes completely unrelated aside from the crossover event. The reason for that being that, from what I've seen, a "multiverse system" usually requires little to no exposition on why it exists, and a "branching timeline system" usually needs to be established in some way. This can make things pretty complex. So I think I would personally go with the multiverse system, simply because then we can still have our fun with crossovers, while at the same time keeps things straightforward continuity-wise.