THIS.
You know, we all go on and on about how it's possible for someone to make the "perfect" CV movie if they just do "this, this, and that".....and yet we weave page after page of nonstop arguments amongst ourselves everyday here over what is and is not a good Castlevania game. How can anyone hope to condense the essence of this massive series into a 2 hour work of filmmaking that even the hardcore fans could really get behind??? Any such attempt is pretty much set up for failure before one even gets started.
I have collected a LOT of very useful information from Castlevania fans,
(several pages of this discussion, and many other places in the Internet)
made a huge work to compile everything and make it clear! Then I sent it to Fanvision (in December last year).
All the information was carefully analyzed by Fanvision team and producer (they have reported to me)
that is why I am sure that everything will be done right!
Let's hope!