Mulan 2: 1998 [patched]
Additionally, there was a tangible presence of Mulan in 1998 that likely cemented the "franchise" feel. Mulan appeared as a central character in the video game Kingdom Hearts II (released later, but developed with the IP in mind) and in the Disney Princess marketing blitz of the late 90s. The saturation of the character made it feel like there had to be more content, leading to the false memory of a "Mulan 2 1998" release.
Below is a write-up of the 1998 classic and the subsequent sequel often associated with it. Mulan (1998) mulan 2 1998