Not everything needs to be Chūnibyō coded, but I too was hoping that when the Goddess mentioned that the summoners got greedy and tried summoning multiple people at once that it was foreshadowing that the Royal family/country that summoned them were the bad guys. They even had a missed opportunity of writing a clever way to find the royals motives by making their classmate's absence be the reason for them to be on alert and distrust things at face value..