Yeah, itll be an additional 28 15x15 puzzles. Any new packs will be this size.
I included so many of the lower level puzzles as many PlayStation owners havent had a chance to play a nonogram game before, and almost all of them would skip the How to Play section. At the 5x5 level its easy to grasp the basics through trial and error. I guess 28 might have been a little excessive.
I did have 20x20 puzzles to begin with, but on the smaller screens this proved to be almost unplayable.
So that'll be 56 puzzles for the 15x15, allright you got my money sir.