I cant wait for TU2. It may actually cause me to NOT play The Force Unleashed.
Sadly, there will NEVER be any new perms. Bungie already stated this on the B.NET forums. Something to do with the way the perms are coded into the game...it would require a TON of programming, etc to install new perms.
But assuming the Skull Achievements are real, which im sure they are, then that must mean its a campaign expansion as well. And how Bungie said "As folks have seen, these aren’t the only achievements we’re adding. But without proper context, there’s not a whole lot else we’re going to say. Stay tuned."
IMO i think were getting Campaign levels too. from the looks of the achievements, about 4 or 5 levels. YAY!
as for the Vidmaster Challenge, it was originally the Marathon Vidmaster Challenge, created by Jason Jones. He challenged "Anyone who thinks they rule at Marathon" to beat all of the levels on Total Carnage difficulty, using only the x1 health and pistol options, and required that people post recorded replays. Hence the Vidmaster Challenge. i think it was a japanese guy who was the first to do it. They actually created a separate physics model, because some levels required you to start with certain weapons besides the pistol, so you could activate switches that were out of reach etc., thus voiding the Challenge.
Whew, that said, i have no idea what they could be for.