The power of four in 2015

A new era has begun with the College Football Playoff, and the theme to this season definitely revolves around the number four.

With that in mind, here's a look at four topics that will dominate the world of recruiting as we head to signing day, which coincidentally is on Feb. 4.

Four ways Alabama's top class can be overtaken

Alabama's 2015 class has rival recruiters describing it as "the best class in the last 20 years," but with signing day still about six months away, it's too early to say the race for the top spot is entirely over. Here's a look at four ways Alabama's epic class could fall from the top spot:

Decommitments: Even mighty Alabama has seen decommitments, and with so much talent in this class and already on the Crimson Tide roster, there's surely a chance somebody will get cold feet before signing day. Just because a prospect has committed doesn't mean other schools will stop chasing after him, especially if he is from a high school in SEC territory. The most likely candidates to decommit are ESPN 300 defensive lineman Jonathan Ledbetter and ESPN 300 linebacker Mekhi Brown.