Original canon is supposed to be a "secret history" type thing, where it IS a fictional take on history, but compared to the "rest of the world", stuff like the battle between good and evil was happening along side events of history, just "behind the scenes". I do like how it does try to ground itself in OUR world by mentioning events and even locations. While people brought up the explosion in LoS2, the LoS series never really mentioned anything regarding our world. It seemed to distance itself from not only the original Castlevania canon, but history itself.
And call me a fanboy of the OG canon, I really DO love the nods regarding CV and history. 1476 being the year Trevor defeats Dracula(as being the year of his purposed death, give or take a year, as it's debatable) fits. In the series, to that point, Dracula never really DIED. So, in our reality, where we are told one story, the truth was the TREVOR killed Dracula, his body disappearing representing his ascent into his undead state... love unlive the Dark Lord! Little things like that, I feel, are cool as hell. Mind you, CV3 was also established before IGA's "Dracula was 800 years old" thing, so if you just go by CV3's original intention, it's not that hard to swallow. In a way, if they reboot it(like I said, I'd actually want Dracula to be Vlad, not Mathias, nor Gabriel, but Vlad Tepes), I'd love for them to keep the little nods towards history. Doesn't have to be exactly like the original canon, but seeing a few little winks towards different historical events would be cool as fuck!