User blog comment:Crimson and Darkness/Volume 25 discussion blog/@comment-185.112.105.215-20180606135209/@comment-28884330-20180609074834

There is a key difference in that Great Red, Sirzechs and Ajuka were all mentioned in the same text. Meanwhile, the gods in this speculation have not been mentioned as such.

The new Super Devils were born much later than that Volume took place, and Trihexa was sealed and a spoiler at that point (even a spoiler to the characters themselves, since its existence was not even known in-universe).