[video_bar] The 2013 Lucas Oil Pro Motocross season comes with one of the most hyped rookie classes in some time, and Generation Next will check in with the newest faces on the circuit as they transition towards becoming tomorrow’s stars. At Hangtown, we caught up with three of the top rookies: Zach Bell is a fast-starter with a couple races under his belt from 2012, Justin Hill makes his outdoor debut following a season of…