Fifth Element
Legend
We have no indication that they are collectible, though. If the power cards are the same in each set of Martial Heroes 1, for example, they're not collectible because you know what you're getting. You're just paying a higher price per power compared to a splatbook, especially if you're not interested in the minis.However, I completely LOATHE the idea of collectible powers now.
But if you're not interested in the minis and still want the powers there's DDI. I would be shocked if they didn't include these powers in the compendium.