A Sun Vulcan movie was released on July 18, 1981 at the Toei Manga Festival. It takes place some time after episode 23. In it Black Magma decides to separate Hiba from his teammates while plotting to blow up Tokyo with hidden bombs.
Takayuki Hiba / Vul Eagle II

Kinya Samejima / Vul Shark
Asao Hyou / Vul Panther
Commander Arashiyama

Misa Arashiyama
President Hell Satan

Cyborg Queen Hedrian

Amazon Killer

Jiro Sakai
Masao Akino
Mari Ogawa
Emi Matsuda
Rumi Matsuda
CC (voice)

Black Sun God (voice)

Zero Two
Zero Three
Zero Four
Sun Vulacn Robo (voice)
Fireworks Monger (voice)

Yukari
Tsutomu
Mother
Police officer