Well, I'm not sure I could name 10 things, per se, but what I'd want most of all is that they'd take away game-only features such as breakable candles, wall-meat,
Sub-weapons
,
No Introduction, It just starts off with the bridge opening up.
No dialogue
An unnamed Belmont
[...]
The sub weapons are already on him
,
Slow, annoying falling bricks
[...]
Hearts
and many more. I also wouldn't want to see Conan Belmont nor
Dracula tells the whole story before the fight
, that just wouldn't work. Sure, it works in some old games, maybe even some new ones if done right, but in a movie it just...wouldn't work. I want that to be the number one thing to have in mind: Have it a good movie, regardless of how well or badly it portrays the in-game universe. I also wouldn't really want to see platforming, it'd feel excessively silly.
In terms of the story, I'd prefer to see a new story, I don't think any of the games has a story that is good enough, but can also stand on its own. Games like Aria, Lament and Ruin all ride off of other games in the series, while games like CV1, CVIII and Rondo don't have storylines that would be good enough for an actual movie. So I'd like them either to take one of those stand-alone stories and add an extra layer of story to it, most probably CVIII due to its cast, or just have a completely original story featuring a Belmont. Kind of built up like Lament, only with Dracula dying in the end.
Oh, and Dracula needs to be in it. While I do agree that the series can very well expand beyond him and introduce new villains, if they don't want the movie to ride piggy-back off the games in the series they NEED Dracula to be in it, since he is, for better or worse, the core essence of the series.
So, in short:
Good,
independant storyline.
Have it a good
movie, not have it wave its video-game heritage around.
And...that's pretty much it. I don't need 10 things, just 2 and a lot of text
Edit: Now that I think about it, I guess I could do even better, and put it together into just one point:
Don't have it a bone to throw towards fans, but rather a good, independant movie all on its own.