Lefty / Happily Married / Parent of 2 Girls / Christian / Yucata User
Smack dat Ghoulie, Mr. Trolla!
But all existing expansions AREN'T compatible with underground. Off the top of my head, Frightened Pixies and Tomb White Ladies are combos that DofW suggests you reshuffle. Among others.
This is irrelevant since the OP was asking specifically about the 2 most recent Race/Power expansions.