No, I haven't really found any SN/X-Men crossovers, except a few where Sam and/or Dean find out they're mutants because of a doctor's visit.

The curse is interesting and I may revisit it at a later date, but I'm really trying to write my long _Devour_/SN crossover right now, so the only other things I'm working on are the ideas that pop into my head and demand to be written.

Thank you for reading! And I'm truly glad you enjoyed it.