Car died on freeway. Spark or Lubrication problem?

Best guess, since this happened a while ago, is the timing belt has broken. This would have caused the engine to die instantly. Additionally Honda engines are intereference engines which means that if a belt goes south then it can cause the pistons to crash up into the valves doing massive damage, Try pulling all the plugs and see if they look like they have had damage to the electrodes.Or you can pull the heads and see there. If so then you will need a serious engine rebuild.