User blog comment:Jacknapier10/Which characters cannot appear in the Marvel Cinematic Universe?/@comment-5350299-20140428113836/@comment-24901406-20140511164918

Quite, of course these vary from small numbers to huge ones. The X-Men is up around 800 characters bu on the other hand Deadpool is a separate franchise in his own right which probably only consists of himself, and there can only be around a dozen characters at most tied up with Namor.