#2. Chris Jericho - Had the greatest run of his WWE career in 2008
Few Superstars in wrestling or WWE history define "reinvention" better than Chris Jericho. He had a good first run with WWE and ended up taking a two-year hiatus.
When he returned to WWE in 2007, it was a prelude to what would become the greatest year of his entire career. He returned in November 2007, and during his first match back, he debuted a new finisher called The Codebreaker.
Before that, he had used the lionsault and even the Walls of Jericho. But the Codebreaker was marked by his big shift in character. In 2008, he eventually became embroiled with Shawn Michaels, leading to one of the greatest heel turns in WWE this century.
It built up and ended up becoming his most acclaimed character - even though his run didn't last too long looking back at it. Either way, the improvement in Chris Jericho in 2008 saw him capture the World Heavyweight Championship.