Entitled "La planete sauvage"; Czeckoslovakia "Divoká planeta" ("The Wild Planet")
The poster image was of an exotic jungle like tangle around a clearing , two combatants have pincher creatures tied to them and are about to engage. The humans are male and bearded and there is a crowded circle of onlookers.
This was a very early Genre science fiction treatment released in the general market. If there was limited exhibition at least it was the trial balloon of new forms. Todays animation festivals are a leading edge of animations arts support. This was a major film .