Definetely some sort of Zombified Town stage, but as for something more original, I've always thouht it would be cool for one of the characters to actually have to go to Hell, similar to the Abyss in DoS, but you should actually have to fight Satan. Other than that, An armory where there are just tons of weapons and equipment for the taking would be nice. Then, the boss would be a ghost that possesses the weapons and you have to fight them.
i don't like you

you thinking of two things i already planed to put in my game.lol
going to hell and fighting the devil

but i still have my own twist i plan to do with my game

oh well it'll be awhile before i do it but heres a shot ver of my story line for my game.
cursed blood story will start out with the last lvl of castlevania 3 fighting drac with trevor and alucard.
alucard is turning into a full vampire and must kill drac to stop it.
well kill all three forums of drac then alucard go's into his long sleep and begins to dream,this is where the game starts off really
drac kidnaps ppl of the church one being lisa and one being darius belmont's/aka hanz, mom.
well drac falls for lisa and turns good and lets everyone go death don't like this so he kills darius mom and plaints the seed to of hate in him.
he see his mom took off to the castle then gets the vampire killer out of the church makes his way down the mountain thro the woods,court yard,castle entrance,the Prison only to see his mom killed and fights death and gets knocked out.
then about 10 years later we see lisa and kid alucard coming to the castle to see his dad.
well alucard has his sword training with olrox wile drac and lisa spend time together.
well darius belmont attacks the castle at this time with all the order of the church,and kills drac and takes lisa to be burned as a witch because they seen her helping the sick and she found in the castle.
well death tell olrox what happened and to keep alucard safe right before he dies but alucard want to save his mom so he fights and kills olrox and run thro the castle to the keep hoping to save his mom.
only to find everyone gone and see them racing away out a window,with lisa tied to a stake so he turns into a wolf and jumps out the window and races after them wile there shoting arrows at him.
(it'll be a very cool stage where you'll have to destroy there carts,horses and the ppl on them wile switching into bat or a wolf to avoid there attacks. i want to use geoffrey gunn sonata of ablessed child for the music for this stage)
well he kills all humans who get in his way until he finds darius and kills him.
only to be to late and have his mom stop him from saving her and killing the rest of them.
he gos to sleep for a few years only to be woke up by death who tell's him theres a mutiny and everyone in the castle is following this demon Galamoth.
(kid dracula retelling.lol)
they think drac has become weak because he turned good and they want a new big boss

so death wants you to stop this mutiny to stop them from stoping the return of your father and he must stay at the keep and stop them from entering.
(here i'll keep all of the castle from the other time being it part of the story,added the little part of the first lvl of kid drac,but none of the other lvls of kid drac.lol because this all takes place in the castle well mostly)
well he kills all kind of demons then ends Galamoth,drac comes back and he want all bad guys want thats right he cast this curse on the town that killed his beloved lisa.
and turns all the souls of the holy church town into his new castle there souls to be tormented forever and to be bound to him to surfer as partaker's of his curse.
well alucard can't stand this because it not what his mother wanted so he go's off to live in this other town years later.
this woman gets killed by demons of drac and she was nice to him and reminded him of his mother so he go's back to the castle to kill his father and another man go's to the castle to save his grandfather and sister sonia darius belmont JR.
but forgets everything when he see you his father's killer.
so as you go thro the castle and you have him trying to fight you many times and alucard won't kill him.
well drac controls him because of his hate even has him try to kill his family drac kills him and you save the grandfather and baby sonia after you kill drac.
well sonia falls in love with alucard after she grows up.
alucard denies it but he loves sonia too and they make love then drac comes back and alucard disappears and sonia go's after him you know castlevania legends story

.
well she kills alucard and he go's to heaven see his mom finds out that drac is just a pawn and theres a bigger fish to fry.
she tell's him he has only a little time there because drac is going to bring him back,but he should go into hell and see a man name leon that know what he must do to end the evil.
well he takes the fall into hell and finds leon,leon tell's him that drac is just a pawn death tricked drac and him and is really the devil running things and God won't stop him because the whip the vampire killer and the crimson stone are mans tower of bablon,not trusting God but making ones own way save themself.
so the devil can do what he wants without God stoping him,so they must be destroyed.
but the vampire killer can only be killed when an evil belmont uses it.
well alucard comes back to life under dracs spell and has been turned into a full evil vampire,trevor beats him and alucard regains his mind and joins him to kill his father before the curse can never be redone.but before they get to far alucard is woke up by simon belmont and the dreams of the past ends.
a man that works for drac has took the vampire killer and took it to the castle and simon can't get into the castle without the power of the whip.
so alucard helps simon this happens after C2SQ they split up after simon gets his whip back simon go's after drac and alucard fights death.
this might be the end because of the jumping around it'll be long as hell aready

might take the story past Soma's time and even make what alucard was doing in aos part of my story who knows.lol
i got alot of stuff i could do but don't know well let me know what you think.lol
i know i really should write it out better and a more full story.
but i'll keep it for the game be cool
