If it is truely random, I feel sorry for all the variation hunters.
Well, let's see -
Early reports on the figures say that the "good-guy" holos (Amidala, Han, Luke, Ben, Yoda, Rebel) will come with the "good guy" figures and the "bad guy" holos (Vader, Emperor, Maul, Dooku, Fett, Stormtrooper) will come with the "bad guy" figures.
So that means that each carded figure should
only have 6 variants possible (barring any errors which may likely happen). That means you carded uber-completists can look forward to:
approximately 56 basic figures
@ approximately $6 each
X 6 holo pack-ins possible
= $2,016 total
And that is just for starters - each additional variant/running change adds another $36 to the total...