Martin Sheen In Negotiations to Play Uncle Ben in Spider-Man

It's funny how with all the Spider-Man cast news and rumors, I didn't even think about who would play Uncle Ben. Uncle Ben is perhaps one of the most important characters in Spider-Man's origin. If it wasn't for Uncle Ben getting shot and killed, Peter would have never become a superhero. 
 
For a Spider-Man movie, you should have the right actor to play this important role. The problem is, the actor probably won't get a lot of screen time. 
 
The Hollywood Reporter has announced that Martin Sheen is in "final negotiations" to become the next Uncle Ben. That sounds pretty cool. Sheen is obviously a big name so perhaps it's the small role (and big paycheck) that would make this appealing to him. Then again, since this is a reboot, maybe Uncle Ben will have a bigger role. 
 
The movie is set to begin in December. What are your thoughts on Martin Sheen being Andrew Garfield's uncle? 
 

Update 

Now THR is reporting that Sally Field is in talks to play Aunt May. 
 
What do you think about this? Do these two look the part? They're both good actors but don't seem old enough to play the comic book versions. Although I suppose you can say Aunt May from the Ultimate comics has a little more spunk.