I'd wager that many people were saying that about another Cub pitcher back in 1997 or 1998 (Kerry Wood), and had he not gotten injured, I believe they'd be right. So basically, to say that any young pitcher will be the best one day is expecting a bit much. Anything can happen, and a career-ending injury is just a line drive away these days, unfortunately.
I'll take MB over MP
A career ending injury from a line drive shall now be known as a "Wilbur Wood." By the way, it's Jesus H. Prior. :puke