I can't really comment on the accessibility of Toys R Us mates yet as I am Canadian and the only ones we have received thus far I haven't really been interested in but I was in to check if they had the Iron Man 2 mates and it seemed like they had one of every type in stock. The Spider-Man friends and foes set lasted for a few weeks. Not sure if that was lack of interest in minimates in my area, or just because of the quality of the set itself. Time will tell with the Fantastic Four wave I suppose.