This is where I see an issue here. Throughout all the mentioning of the 1999 game in other CV games there was absolutely no mentioning of a rival hunter or rival hunters. There was only Julius, Alucard a few soldiers for military escort and defense, and Yoko Belnades' (Father? Mother?). No offense of course but Julius has no time to be dealing with rivals. He's got a job to do and that's kill Dracula. Besides if the Military knows all all about the history of Dracula and the Belmonts then they won't let a cocksure rival with delusions of grandeur or a personal vendetta (either against Julius or Dracula) enter Castlevania. It would compromise the mission at hand which is something the entire world itself cannot afford.
Nowhere is mentioned a number of things that must've happened in 1999 where we have to fill in, because the event is only spoken in a broader sense, never in detail. If I do not take liberties to
create, and keep myself restricted SOLELY to what little information we have, we'll have quite a barebones thing that makes not much effort to explain stuff and provide an entertaining story to read; Something that made me enamored with the series is the "opponent" factor, for instance, introduced by IGA as Richter Belmont to Alucard, that became a thing: Richter to Alucard, Albus to Shanoa, the Candidates and Graham to Soma, the Sisters to Jonathan and Charlotte... There's always that "foe" who's under control by someone, or who's aspiring to reach the same goal as the protagonist. On my case is a rival who wishes to destroy Dracula before Julius does.
There are some details that I can only convey by having this rival be present, and fanfiction will be inevitable. My goal with the fanfiction part (which will be quite big to explain things that have zero clues, like Julius Belmont's origin, for instance) is to make it as plausible as possible by connecting the dots that this story creates. Julius will have quite the convoluted origin, btw.
About the conflict between Julius and this rival, It's not about "having time to deal with a rival", but about the rival entering the scene by himself and forcing Julius to it. This rival plays an important role in the "purpose" thing I proposed above. The rival doesn't carry weight by SIMPLY being a rival for being a rival's sake, but by having a story himself. His goal is NOT to face Julius (he's the "opponent", but he's still a rival. He's there to take Dracula, and not Julius), but facing Julius will become part of the grand-scheme of things and will help me construct the "conflict of purposes" idea I proposed above.
I'll admit that the rival's presence was firstly created to reflect IGA's ideas of the "opponent", but he evolved beyond "existing for IGA's sake" to actually respond a few questions on the plot. There's a lot of ways that a rival could circunvent the military's and the church's defenses. I believe that I managed to
create a character that can explain some details, be a rival, and complement the overall plot, without it feeling too implausible.
X, if you want, I can send all the details about who is this rival, and his role. Of course it's spoiler and won't make much sense without context, but I'll provide you as much context as possible, and try to explain how the concept fits in the story.
EDIT: I had the whole thing here, but I decided to remove it as I'm not yet ready to present the idea in such spoileriffic fashion
On the whole it sounds awesome, and I think Chern makes a good point that there might be a decent crowd here to help put stuff together with you. I wouldn't say I have much to offer, but I'd offer it nonetheless, if for no other reason than to see something awesome come to fruition!
It would be very nice to have help, since there's a LOT of talented people over here (including Chernabogue and his music)
Anyone can help, but I can't guarantee I'll listen to every single thing or add every single change people want, since this might disrupt the overall "architeture" I'm going for with this. Much of what I've written up there is kinda set in stone because they've become "beams" to support the story. I've been thinking about them for years (really) and imagining how they fit the story and how to make the story interesting. The rival thing above was one such thing. But of course, I'll be accepting all kind of criticism and feedback to improve on the story, and I'll try to be as malleable as possible, but I'll ask people to hold on their horses a little while I lay the main framework for everything, before they start poking holes at it.