Marcoshark: There are many similarities to be noted between MR. ARKADIN and THE LIST OF ADRIAN MESSENGER, short of making any definite linkages. The greatest is the long friendship and professional relationship of Orson Welles with John Huston.
Starting at that point, we might point to the fact that both films are in B & W, harder for Huston to pull off in 1963, given his need for Studio backing. (Huston had much bigger Hollywood stars in his cameos though.) The plots have a distant similarity, and the screenplay is by Huston's longtime friend and collaborator, Anthony Veiller, who also worked with him on the the screenplay for Welles' THE STRANGER.
In THE LIST OF ADRIAN MESSENGER, Huston extensively employs Welles' technique of dubbing actors with new voices. He hired Paul Frees ane Eric Heath to do a lot of the uncredited post-production work. Frees followed Welles as one of the other great voices of American Radio's Golden Age, most remembered, in my mind, for his dialects in the long-lived great CBS adventure series, Escape. But he did hundreds of other roles on radio, and later much vocal work in Hollywood movies.
Huston, according to my Epinions colleague, Brian Koller, went Welles one further. According to him, not only were some of the voices of Kirk Douglas, Tony Curtis, Burt Lancaster, Robert Mitchum, and others dubbed, but lesser actors also played some of the parts attributed to the Stars. Under all the makeup, who was to know?
If so, it was hardly worth the trouble. I have always liked THE LIST OF ADRIAN MESSENGER on its own merits, requiring none of the special pleading formerly needed to justify MR. ARKADIN, and perfectly executed except for those klunky, gothic star turns. The critics tended to concentrate on what they considered the gimmicky factors in Huston's picture, ignoring its beautifully paced suspense, plotting, main performances, photography, editing and score. I'm sure those criticisms hurt its box office.
So far as I know, Huston did not repeat the Welles' experiment in subsequent films, at least not to the same extremes.
Interesting that you should come up with that comparison, markoshark.