Collections including Collision Course
List of Collections
An open collection for transformative works featuring Michael Fassbender and James McAvoy fictional character (not RPF) crossovers, such as:
Carl Jung/Valentin Bulgakov
Edward Rochester/Tom Lefroy
If a work is tagged "X-Men: First Class (2011) RPF" it is not eligible, *unless* the work does not actually qualify as an RPF story. The "X-Men: First Class (2011) RPF" tag is currently in use as an AO3 tag workaround, since there is no way to request "give me every fandom in which Michael Fassbender or James McAvoy played a fictional role."