It's been confimed you can contact lycantropy again after your cured

No, it's been confirmed that you can regain your lycanthropy after being cured of being a vampire lord. I'm pretty certain the way it will work is that if you are a werewolf when you become a vampire lord, your werewolf abilities will simply be suppressed rather than cured, and then once you're cured of being a vampire lord, you then immediately regain your werewolf abilities. Of course, about what GStaff said, he may not be 100% correct about lycanthropy's involvement in Dawnguard, or possibly only meant that the story doesn't involve werewolves. I remember that Matt Carafano (not sure if I spelled his name correctly) stated once that all races will be represented in the marriage options. That turned out to be false. Now I'm not saying that I think there will be anything besides a perk tree for werewolves, just pointing out that sometimes they aren't always correct about what is in the game. So it is still possible that this isn't the case about what I just said.

If you still can't become a werewolf again or become a werewolf outside the Companions, then I'm certain people will still complain about it and that they may consider doing something about that in DLC.
Anyway, just about everything in Dawnguard is looking pretty awesome.
