Nah it can be a paragon path. Although the board-game has it as it's own class with mechanics and such. As stated above. That would be really cool if it was a starter class in the game.
From the little bit I watched the video it looked like the larger mob did a charge attack. It's arm held across it's body and over the other shoulder. Giving you a large bright sign saying: "Block soon!" Where as the lesser mob was just making auto-attack pot shots at the guardian. And with that I would asume... That is it…
Hey!! They showed a great Weapons fighter Wielding a large 2handed axe in one of the other videos. It was a Dwarf. So look for it. With that said I am sure that wielding anything from a Scythe, to a 2handed sword, and a halfling is possibly already in the game.