Personally I think the series should end with Ford, and not make it into a Bond series with all new facess like a new Bond, M or a Q! Ford is the reason that the Indy movies were such a success. Yes, the director, artists, entire film crew, editor, and the cast contributed immensely. But, it was Ford's charm and everyman qualities which defined the character of Indy we all know and love.
Finn, you get bent out of shape every single time I or another poster mentions Fillion, but who do you then suggest? You want to pose the question of who could fill other character's roles, but you suggest none yourself. Instead of punching people in the face, how about throwing in a few names instead of shooting down others ideas!