really wondering where Hoss and Irwin are in this? Raven is the only one of the three at the party so it is doubtful that this is when things break apart not to mention Dex is still alive.
These little hints help to distinguish this as another past event not linked or remotely linked to the show down of HIM and the remianing heroes. As for raven she does not like kids or more to the point does not know how to deal with them. Mimi and Raven both have powers that tie to thier emotions so having her there as a instructor makes sense. As for Dex and Jeff they are like Mimi's caretakers/protectors. Real question I want answered is what happened to Blossom and Dexter's relationship and where are the other heroes?
No one knows what the future holds until it happens.Anything is possible just not probable.
Some might not live long enough to truly appreciate life but you have to take good with the bad and hope they learn