Tone is fairly generic, I think. It's mostly a dungeon crawl through exotic locales, in the service of the Raven Queen. If your character has trouble working for her, that would probably cause some friction. Obviously you'll want to keep the other party members in mind when putting your characters' personalities together, but I don't think there's anything in the adventure itself that would preclude, say, mercenary or evil characters.
It sounds like there's consensus for going with the epic game, so I'll go ahead and get that thread started pretty soon. As a preview of the character creation rules, I'm basically good with any setting-agnostic material (so no Forgotten Realms backgrounds, e.g.) from WotC published books, within reason. Things from Dragon or adventures or preview material, ask me first, please. Standard 22 point buy, standard wealth, etc. I'm happy with character builder files, but don't require them.
Renau1g: Revenants are fine, in fact quite thematically appropriate.
Ata: Not sure about hybrids. I haven't really looked at those rules yet. If you're really keen on it, I'll look them over, but no promises.
Also, I know some of you guys are pretty good at char optimization. That's fine, and I'm happy for you to build powerful characters -- you'll need them! -- but try not to get too cheesy. I'm not going to make any specific bans; I'll just remind you that if I have to ramp up the difficulty because you're waltzing through the encounters, there's a decent chance that I'll overshoot and TPK.
