This was evident with the Night Warriors 2 logo found in the game's graphics data. There were implied plans to create an English version of the game, which would've gone under the title Night Warriors 2, but was dropped possibly due to time constraints. Donovan Baine's stage was added and the Pyron boss fight now takes place inside the "Fetus of God." All character, aside from Pyron, were given one shared ending. CPU opponents appear in different costume colors and background stages, from Vampire Savior, received new colors. Changes were made to accommodate the added characters. The game play is the same as with Night Warriors, though slightly tweaked so that the characters play similar to their appearance in Vampire Savior it also features the double-health bar system from the aforementioned game. Vampire Hunter 2 features the same character roster and soundtrack as Night Warriors: Darkstalkers' Revenge (which was known as Vampire Hunter in Japan).
In their place the missing Night Warriors: Darkstalkers' Revenge characters, Pyron, Donovan Baine and Huitzil who did not appear originally in Vampire Savior were used. The main difference between Vampire Savior and Vampire Hunter was removal of Jedah Dohma, B.B.Hood, Q-Bee and Lilith.
Both games were not direct sequels but altered versions of Capcom's original, Vampire Savior.
This page of Mizuumi Wiki has been reformatted to include the workflow & findings of my project in a format intended to be read as an article. Vampire Hunter 2 (ヴァンパイア ハンター2, Vanpaia Hantā) was released August, 1997 simultaneously with Vampire Savior 2. Since the summer of 2018, I experimented & documented R.A.M. The arcade game was only released in Japan. A competitive fighting game similar to the vast majority of Capcom titles released in the '90s.