I have seen plenty of MM figures-if your local Wal-Mart of someone is telling them that they can't put them out then they are full of bull hockey. I have personally purchased MM Jokers at Wal-Mart and Target (purchased the one at Target today about two hours ago). Some people are saying they are too scary, put that isn't why they got pulled they had a legitimate problem, because the packaging is different on the new Jokers-I don't know but people I know that work at Wal-mart say they got re-called but about two weeks ago they received a memo stating to put them back out with the new packaging (had to ship back the old).
It is very very difficult to find these, it is basically luck and finding a chase figure is even harder. The boxes come packed with only 4 figs and they may all be Batman-that is just the way it works. Good luck, you have to be willing to call and ask all your local stores if they have the figures or not before wasting your time and gas-or you just happen to be in the right place at the right time.