I only brought up the cast list with regards to Fiennes because when previous releases from Eon were brought out crediting him as M The theatrical Poster Press releases Tweets from the Offical James Bond twitter account the argument was made that we were waiting for the cast list to see how he would officially be credited As you say Prisonermonkeys the intent is to present the information in a way that is representative of the subject manner in this case Fiennes has consistantly been credited as M in the lead up to Spectre in official Eon releases it is in keeping with the precadent set by the earlier films in the Bond series and consistant with the film Spectre where he is referred to as M throughout the film and only refers to himself once as Mallory at the climax As SonOfThornhill suggests the name Mallory should still be used in the character description in much the same way Oberhauser is used in the description for Waltz s character but a credit of Fiennes as M would be more representativve of the film than the current credit