Complex sentence: In 1994, Nishizaki designed a short-lived follow-on series, Yamato 2520 and was sued by Nishizaki was later sued by Matsumoto for breach of copyright, which halted production of the video series after only four episodes.
Split into simpler sentences: In 1994, Nishizaki designed a short-lived follow-up series called Yamato 2520, and was was later sued by Matsumoto for breach of copyright. The case over Yamato led to halting the production of the video series after only four episodes.