User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-30924344-20180320231115

Ok it may be very possible Ishibumi has foreshadowed (and trolled us since the beginning) Team Black Satan of Darkness Dragon King. Just look at what he says here in the Afterword of Volume 1:

"The last boss of this book is the 'Dragon-King of Darkness Black Satan' who holds a grudge against the main character".