Howdy,
As if WotC and Hasbro would consult me about such a thing. With that in mind, why would I spend any of my valuable time pondering such a question? That would be completely vaccous nethinks.
Being familiar with how motion pictures are made, such a decision would be up to the director and the casting people, so I would have no say in the matter even if I was a story consultant.
To the point, though, i have never thought about the matter, and I do not have any actors in mind. I wouldn't mind seeing Vin Deisel as Mordie, though. That's because he is a D&D fan, of course.
Cheers,
Gary