Goldar waits, biding his time, near the audience. He isn't interested in going to hunt down the other Legionnaires, nor does he even remotely care which side ultimately wins this fight. He came here for one reason, and that was to kill the Red Ranger, and bring his head back to Rita and Zedd on a pike.

So Goldar stays. Jason won't be able to resist checking on the terrified audience, and when he does, that's when he'll strike.