I thought about a combat medic type thing and then I thought why waste it? The bioware guys said they want epic. Well as much as I enjoy playing a healer in other MMOs, it's not my idea of epic. Plus they're leaving them for last...so they must be fairly interesting. They wouldn't want to announce healer as their last and final grand class. People would not be so thrilled.
They've got Warriors for each side (JEDI/SITH) - TANK/DPS
They've got heavy hitting ranged (Trooper/BH) - TANK/DPS
They've got stealth and non-conventional (Smuggler and likely Imp Intelligence) - DPS
What's the last archetype they're missing?
Sadly the only thing D&D thinking pulls up is a healer class, but I don't think they'll go that direction.