The Mystery of Diablo III’s Final Character Class

Wired.com has kicked up a short piece about the mystery surrounding the fifth and final character class that Blizzard will be implementing into Diablo III.
In the past, game director Jay Wilson has said that the class selection was contentious even among the Diablo team.

Wilson said at Blizzcon that his team doesn't yet have a final concept for the fifth class, and that they recently changed their minds about it.

But he's quick to add that doesn't mean that they've changed the character completely.

(We changed gears,) he said.

(We changed our high-level idea of the class because it was actually one of the first classes that we picked, years and years ago.)

The fact that the class was chosen first, he said, was part of the reason why it needs to be re-tooled.

(We've had this class for four years, and it's not as exciting to us as it used to be,) he said. (It had actually become a chain around our necks.)
There has to be one class able to wear heavy armor, right? It won't be the paladin, so my guess is that they're working on some sort of cavalier or exotic knight that goes along with the Diablo storyline.