Oh, dear, that doesn't sound good. If the Wal-marts are going to trash the displays when they're empty, I hope the vendors are well stocked with displays as well!
I think the location isn't too bad - it's catering to people who are likely to buy them. But I do kinda wish they were in the Lego aisle, next to the DC Superhero legos. That would be a good idea, I think.