New PC roles article: "Unlike their 3e counterparts, every Leader class in the new edition is designed to provide their ally-benefits and healing powers without having to use so many of their own actions in the group-caretaker mode. A cleric who wants to spend all their actions selflessly will eventually be able to accomplish that, but a cleric who wants to mix it up in melee or fight from the back rank with holy words and holy symbol attacks won’t constantly be forced to put aside their damage-dealing intentions. A certain amount of healing flows from the Leader classes even when they opt to focus on slaying their enemies directly."
According to the PC roles video, the Druid is just as good of a healer as the Cleric, making the Druid a leader, not a controller.
Druid (divine leader).
Bard (arcane leader).
But, there's still nothing to confirm either as being in PHB1.
We're still sitting on Fighter, Cleric, Rogue, Wizard for the four we know are in. I agree that they should put in two classes from each role.
Fighter (martial defender), Paladin (divine defender).
Cleric (divine leader), Warlord (martial leader).
Rogue (martial striker), Ranger (divine striker).
Wizard (arcane controller), ? (x controller).
However, I don't think that the other controller will be the Sorcerer as per the PC roles video, which stated that the Wizard's and Sorcerer's roles are different. Personally, I'm leaning for a Socerer that's an arcane striker, but, we still don't know.