...Blade Trinity? And a few other stories I think. Mostly when they want to make Dracula the original progenitor of the vampires for the sake of making him a bit OP.
And I hope he impales a few people, even if it's just a quick cut-away glimpse for the audience. Vlad Tepes' historical war with the Ottomans has at least two other references in the trailer: his wife falling into a valley, which she did, and the Night Attack where Vlad ambushed the Empire's army, here presumably repurposed so Vlad can vamp out on Janissaries. Vlad's forest of impaled soldiers is often credited as one of the very few times the Ottoman Empire took a look at an opponent's MO and said "Yeah...let's not fight now. Let's come back with more guys, preferably not us, and try and subvert his rule in some other way."
And I'm hoping for an ambiguous portrayal of Sultan Mehmet II, if not so much for the Empire itself. I want him to be just likeable and honest enough that while we cheer against him at first, when Vlad goes full Dracula and starts losing his soul, we find ourselves actually rooting for him a little bit. There's at least one sword fight between the two, and if you'll notice, the trailer suggests Mehmet already knows a bit about vampires; he's batting silver coins at Dracula. Plus, it'd be nice to highlight some of the details in the war:
1. Dracula and Mehmet had both been raised in Istanbul, Dracula as a hostage, and hated each other even when they were kids. One of Mehmet's best friends was Radu the Handsome, Dracula's little brother.
2. Dracula had originally claimed the throne of Walachia with Ottoman support, as his father had before him. His rebellions led to Radu being sent against him.
3. Dracula received an Ottoman education while in Istanbul, the same one that made his brother convert and become a Janissary. However, Vlad rejected a lot of the education while embracing the tactics and techniques of the Ottomans, and in particular one of the execution practices they had-impaling.
There's so much gray in the historical chronicle it'd be a shame for the writer's to have completely skipped over all of it.