JoeGKushner
Adventurer
It can't be a martial class. Look at the box on page 54 of the Player's Handbook:
Other Power Sources: Additional power sources and techniques provide characters of different classes with powers and abilities. These will appear in future Player’s Handbook volumes. For example, barbarians and druids draw on the primal forces of nature, monks harness the power of their soul energy (or ki), and psions call upon the mind to generate psionic powers. Future power sources include elemental, ki, primal, psionic, and shadow.So, you know, we can argue about the monk's role - though I think striker is likely.
Well, perhaps we'll see two unarmed specialist? Martial Artist For Martial Striker and Monk for the whole running up walls and falling 50' without taking damage?