Will Barcelona have a Messi problem as the Cavaliers had with LeBron?

Lionel Messi and LeBron James have a lot in common. You know, beyond the fact that one of them looks like he was carved out of some impossibly dense space material, and the other needed human growth hormone to achieve a stature that would not be out of place at your local secondary school. Messi and LeBron were both identified as epochal talents as teenagers, and they both surpassed impossible expectations. They've been brow-beaten for not having enough titles too, but more than all that, when they're...