any ideas what units we could see for dark angels and space wolves?
Expecting Dreadwing, Deathwing and Stormwing for sure since they've been mentioned in HH novels, althought we don't know exactly what they do in 30k, and I'd assume the Ravenwing are still a specialist Bike formation (although they'd obviously have a different purpose in 30k than 40k since the Fallen don't exist).
That said, I had expected something like the Invictarus Suzerains for the Ultramarines given the 40k Honour Guard, but I Fulmentarii and Locutarii took me completely by surprise, so I'm not betting on anything.
Space Wolves, not a clue other than the strongest psychic defence and one of the strongest psychic offences amongst all the Legions; the first from their talismans and other anti-psyker gear, the second from their brilliant workaround of the Emperor banning Librarians by calling their Librarians something else. I'd also expect an anti-Marine focus, being the Emperor's Executioners and all, but that may well be far less powerful than it sounds depending on how it's done ('being flexible' doesn't sound like a particularly overwhelming specification, but Alpha Legion with Alpharius kicking about are incredible
, certainly on paper). That said, again, I've been surprised by FW decisions before. I was expecting the Night Lords to have a bunch of leadership-based abilities, but they got an elite anti-infantry army with a shitload of deployment gimmicks and bonuses for outnumbering in combat, and if I'd just been given the rule to read without knowing what Legion it was for, I'd have said Mutable Tactics was an Ultramarines rule).