Diomedea is releasing a Mega Box Set for Mondaiji titled
Mondaiji tachi isekai kara kuru so desu yo? We are the Strongest!
It comes with all the episodes plus a Drama CD and a short story!
It will be released on March 27 this year! Going for 28,000 yen, or if I am right, close to $280. Though the google translate mentioned this "First Deadline" being February 13...
Here is the picture and a video release!!https://www.youtube.com/watch?v=nnMJMrEihWc
Hopefully this is a possible sign for a season 2, who knows but they must have a reason for something to be releasing this box set two years after the series aired and one year after the release of the dub. I'm crossing my fingers!