I'll expect Kyo XI to get that, sure, but there really is no difference with a regular FES. This Athena and Mai could have been a regular FES as was expected by everyone, and they could have gotten this hero series later on.
Also, on a side note, don't expect any collab news for a while. Barely a mention in the Korean stream. It's weird, I could've sworn they said in the previous one that it was coming real soon ?
If I struggled to the end of my determination, to the end of my way of life with my followers, if the result is ruin, then this ruin is inevitable. Grieve. Shed tears. But you cannot regret.