I haven't really be keeping up and can't find the answer anywhere and has anyone heard anything about 2 extra free maps that were cut?
How does this fit your title?
To answer both questions:
Yes there will be an achievement known as Seriously 3.0
The 2 cut maps have been confirmed as upcoming dlc, I think in November.
Well your first answer didn't have anything to do with his question.
But to answer, they haven't said if there will be unlocks for either Seriously achievements.
There is no excuse for there not to be something special for those of use who have unlocked the "Seriously" achievement on either of the last two games.