Vampire Circus was a Gauntlet-like type of game full of vampires and zombies planned for Nintendo 64 by Zed Two who started working on it in 1996. The game was designed so that you controlled just a single character out of the five in the party, and the others would be under AI control, although you could switch which of the five you were controlling. Each had different skills and abilities, so there was good reason to swap your control between different characters, and it was also possible to lose members of your party to the vampire hoard, so you could only control members of the party that remained alive.
Zed Two got quite far with a playable prototype but when Infogrames took over Ocean, who originally struck a two games deal with the developer (the other one was Wetrix), they forced the team to work with Warner Bros properties they just bought at a great expense. The promising project was thus morphed into the less ambitious Taz Express.
All information and artworks are courtesy of Pickford Bros official website.