Dregarnuhr said that if Hannelore revealed knowledge from the future, she would delete everyone's memory... but Hannelore didn't do that, so what will the goddess do now?
Also when she says remove memories, what exactly does she mean? Will she just delete selected bits and leave the rest blank, leaving everyone with collective memory loss, or will she reset the memories to that of the original timeline?
Either way, there will be contradictions, since the knights are less exhausted and Kenntrips' magic tool is gone from being used, which wasn't the case before. Also with rumors of what went down between Wilfried and Hannelore making the rounds, that'll be a LOT of memories Dregarnuhr will have to fiddle with.
I also can't help but wonder, if deleting or changing those memories will be 100% effective, or if the other students might be left with being subconsciously more accepting of Hannelore, even without knowing why their feelings have shifted a little... except for Wilfried, with whom the effect might be the opposite.
I really hope that this book will have side-stories like the main series and one of them will be from past Wilfried's perspective, so we learn both what was going on inside him and what Eglantine told him in private. With Rozemyne, there's at least the chance that she'll tell Hannelore, or the deities, what she did in the past, but Wilfried will forever remain a mystery, if it's not written down in a side-story. Well... maybe in a fanbook Q&A.