Board Thread:General Discussion/@comment-216.106.107.82-20150413001337/@comment-3578815-20150413003731

The only reason that Scarlet' and Silver' are allowed in both "realms" so to speak: is because both franchise can use them. For the X side, because their mutants (and possibly because of their connection to Magneto) and for the A side, they've been on and off the Avengers circle of influence of since the 60's or 70's when they joined them together.