Right now, as far as I can tell from several cast pages that I've read, the term does not include the X-Men films, Daredevil (2003) and Elektra (2005), Spider-Man (2002) and the two sequels, Fantastic Four (2005) and the sequel. Should they? Are you a mod and do consider it MCU?
I'm assuming that Agents of S.H.I.E.L.D will be included in the term since it's Whedon but if someone could confirm this, that would be great. The animated Marvelverse is under Disney but I'm going to assume that no one would consider this MCU, since it's technically MAU (Marvel Animated Universe) if it should be a RP term at all.
If I left anything out, please don't hesitate to point that out.