Hmm... So the TRUE X-Men Franchise History is : X-Men First Class , X-Men + X-Men II = X-Men Days of Future Past. I like Bryan Singer's Logic. He Dumped X-Men Origins, The Wolverine & X-Men III The Last Stand in the Dumpster. LMAO.
X-Men 3 and Wolverine are still canon, as Days of Future Past is a sequel to those films (and First Class)
whatever or not origins is still part of the canon is unknown