I see this is a bug that has apparently been fixed in the 1.1 patch, but I still seem to get it. I've gone back to other saves and tried taking different paths to this quest, i.e. not going on other quests, restarting at beginning of tomb, etc... Yet Wulfgar still stands there and shrugs his shoulders at me... Anyone else confirm that this is still a problem? or at least if there is a way to fix it.
EDIT: I got it to work, may have found weird problem.
For some reason, I went outside and talked to the head guy at that temple place and he still would do nothing. While messing around, I closed the big gate and what do you know, everyone went inside and I could continue this quest. For some reason, just closing the gate outside made everything work. Strange