It seems that Target had mis-priced one of the new LEGO Justice League sets — 76028: Darkseid Invasion — as $59.99, instead of MSRP of $69.99. I found one today, and got to see the rest of the Justice League sets, plus Minecraft, in the store.
As for post-holiday sale markdowns, they had a very slight discount on some sets. I never understand a sale strategy like this – these sets will be bumped around the sale aisle for weeks, just getting more and more damaged.