ok this might help make things clear:
one of the packs is the new avengers pack correct?
that one includes cap, sentry, spiderwoman, and spiderman
the other pack is the astonishing xmen pack?
this one has wolverine, collossus, cyclops, and emma frost
both of those were released some time last year
another one of the 4 packs was the marvel knights 4 pack
it would of included blade, punisher, ghost rider and daredevil, but it was never made.
are you saying that you saw this??
as for the fourth, there was no other 4 packs execpt previously released ones