Picked up Mr. Fantastic/ WWH, Klaw/ Storm, and BD Wolverine/ Cap at the St. Peters, MO store. I can confirm the 4:4:2:2 ratio. They also had the new Ghostbusters wave as well. Funny thing is that there were empty pegs for the new minimates in a different aisle, but I found the new mates in their old section on the bottom shelf. So if your TRU has a similar setup, be sure to check all the aisles to make sure.
I assume the SKU number is on the receipt? If so, then it's definitely a new number. It's a twelve-digit number with the first nine digits being the same, with the last three being different with each pack. The first nine are 699788727.