There was a tread about status of HS/SW grand alliance in Vanguard, since it was missing from Vanguard insert paper. The bottom line or opinion was that alliance is dead, becouse it wasn't mentioned.
I belive this this cut from Wolfstrike preview proves otherwise.
So HS/SW/WH force does work.

No it does not unless they reinstate it.

The Vanguard rules insert says that "... the following grand alliances (only) are in effect ..."

Since the SW/HS alliance is not mentioned, it is NOT IN EFFECT!!!! For it to be in effect requires errata of the Vanguard insert.

Insert also says :
'The Hause Liao-Bannsons Raiders grand alliance is no longer in effect with Vanguard'
-not a single line about SW/HS grand alliance droping. And why would Wizkids
make statment about droping SW/HS alliance in Wolfstrike, if this alliance wasen't in affect in Vanguard ?
I know FAQ didn't even touch this subject.

http://forum.wizkidsgames.com/showthread.php?t=142316

Southpaw says the Grand Alliance ended with Vanguard.

No it didn't! It didn't end because I didn't WANT IT TO! I'm gonna keep putting my fingers in my ears and singing over the cacaphony of people telling me I'm wrong because I WANT THE HS/SW ALLIANCE TO STILL BE IN EFFECT!

Screw you dad, I'm going to my room!

*SLAM!*

Hmm. That was constructive... ;)