The Crossover UniverseTM is a companion blog to the books Crossovers: A Secret Chronology of the World Volumes 1-2 by Win Scott Eckert, and the forthcoming Crossovers Expanded Volumes 1-2 by Sean Levin. Material excerpted from Crossovers Volumes 1 & 2 is © copyright 2010-2014 by Win Scott Eckert. All rights reserved. Material excerpted from Crossovers Expanded Volumes 1 & 2 is © copyright 2014-present by Sean Levin. All rights reserved.
So, if it happens months after the last episode, is this an AU or can it be worked into the CU?
It's an AU, the same one the Buffy Season Eight comics take place in.
I thought so, but there was a Buffy novel that happened after the last episode of the series that you were able to incorporate. I haven't read After the Fall, but from what I heard about it I think it would have to be an AU, but I was not sure.