Possible Lost Spice Girls Anime

This honestly seems interesting. The companies named were legit and the time frame could make sense, even if Kitty Film's disolvement being in 1996 doesn't leave too much wriggle room. I imagine "Pionner" is a typo of "Pioneer" who are now NBCUniversal Entertainment Japan. I'm confident that the image used was fanart and was used just to showcase something with the blurb. The idea of a Spice Girls anime might seem farfetched but T.A.T.u. did have a cancelled anime movie only a few years after this magazine was published. From the link you posted it seems this was made in march 2000. I think the easiest way to sort this one out would be to try to reach out to someone that worked on the magazine since the names are listed there, and even though it's been 23 years, it's probably our best shot. I get the feeling this might've been a rumour that floated around the internet around that time and since this was a niche nerdy magazine the editors probably got the info from there. Both Pioneer and Kitty Films were involved in some big franchises at the time so it's plausible for someone in the know to use those names to make the claims seem more valid, but i'd be pleasantly surprised if it happened that this was a project that was actually worked on.