I'd rather not add it until we get a clearer picture.
Savage Feeding and Totem of the Moon are already confirmed as Werewolf perks in the leaked Game Informer article. Totem of the Predator is pretty easy to make out, and i assume is an upgrade to the Totem of the Hunt. Totem of (Ice?) Brothers is the only one that's really not clear. My guess, is that it upgrades your Totem of the Brotherhood to summon Ice Wolves, instead of normal Wolves. While Totem of the Moon has already been confirmed in the leaked article to summon other Werewolves, a further upgrade to the Totem of the Brotherhood.
Maybe they'll make the Howl associated with the Totem of the Brotherhood like a Shout. You hold down the Shout button for a second, it summons normal Wolves. You hold it down a little longer, it summons Ice Wolves. You hold it down full length, it summons Werewolves. Assuming you have the perks and Totem active, that is.