Usually I would say that adding Morgan Freeman's voice would, by its sheer presence and gravitas, make anything at least 64% better. That's just basic mathematics. But could he play Duke Nukem? Man, I don't know.
Still this (clearly fake) Morgan Freeman video is pretty hilarious. Mostly because whoever's doing the impersonation is right on the money. If you ever wanted to hear Morgan Freeman deliver some classic Duke lines, this is about as close as you're ever likely to get.
I don't know that I ever really wanted this, but now that I've got it. I'm glad it exists.