How did this topic go from the Castlevania movie to Transformers?
Anyway, as someone said before the problem with taking out the Vampire Killer is that it has been a main part of the Castlevania in nearly every game. It would basically be like remaking Star Wars, keeping the main plot intact, but leaving out the force. You're leaving out a major plot point.
Though here we may be starting to worry a lot for nothing. Am I disappointed that they took out the whip? Well yeah, I don't really think it can be considered a true Castlevania movie without it, but if they use the sword, call it the Vampire Killer, and keep the backstory intact I think it could be passable. Sure it wouldn't be the same as the game, but it might still be a good movie. We won't know it until we see it.
The problem with adapting anything from its original format to a new format is that the hardcore fans are going to take a
"they changed it now it sucks" attitude if they change anything big or small. We simply have to realize that Hollywood really doesn't care too much about us. The hardcore fans probably make up a small part of moviegoers anyway and they are going to see the movie so they can complain about it. The people making the movie are just in it for the money. I doubt many care about their original source material.
But so long as this doesn't get as changed as much as Dragon Ball I think it could be okay.