Hey I just wanted to say that I loved your game, it reminded me of SEQUEL games. I saw your decision about the animation and 100% respect that. I just wanted to say that there are people who specialize in making animations from a picture. Like this:
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I just thought this way it wouldn't put any additional work on Kain if that was the main issue. Also I think that you might be planning a bit too much into the future. It's good to be ambitious but you shouldn't make a game that relies on a sequel to continue the story. They should be connected and build off of each other but at it's core every game should be for itself with its own satisfying ending like SEQUEL again or even dark souls. If this was what you had in your mind to begin with please ignore what I said.
I wish you all the best and good luck with your work.