Well, the Petrovsky matter is fair game, especially with it being the future and all that. Things will merge and merge and merge some more. I definitely gave him a Russian voice in my mind, though, and with me studying voice acting and all, I take that stuff pretty seriously. But I'd be OK with anything that's well-voiced and relatively appropriate, British included of course.
The whole "if he's in the game", though, is what I'm taking particular issue to. I haven't been around much lately -- school and work and all that -- but last I checked the Sean Bean thing was just an obvious gag someone made, referencing a British comedian. Unless that's changed, I doubt his presence.
Not that I'd be remotely opposed to it, mind you.