Is it possible to animate the "Angle offset" property of the Glare node? I am making a photon torpedo that has a glare applied to it, which should rotate when the torpedo is on the way.
Most of Blenders properties can be animated. Just hover over the Angle Offset field with your mouse and press I to insert a keyframe. A keyframe will be inserted on the current frame. Move to another frame, change the value and insert another keyframe by pressing I again.
The created key will show up in the dopesheet and graph editor, where you can edit/remove them.