Altered Memories

When Angel agrees to join W&H, part of the package is altering the Fang gangs memories to wipe out what happened with Conner, his very existence even, to let Conner have an ordinary life. What could Wesley, Gunn and Fred believed happened for them to arrive at W&H?
( Altered Memories Theory One )

I would love a ficathon on fans ideas about what the changes would be. Maybe taking one character, and one background from the episodes and writing something about it. Maybe fic, maybe meta, or just an hypotheses?