That's the problem: lackluster sales for XIII and Ghost Rider mean almost certain doom for future Marvel waves.
If you don't want them, buy them anyways, and make your money back on here or eBay from someone that does, and can't find them anywhere themselves. That way, you don't own them, you're not out any money, and you've helped ensure future waves of Marvel 'Mates.
If you don't do your part, you'll never see the 'Mates you wanna see.
Do I really give a flying leap about Rocky? No, but I'll be buying all the 'Mates when they come out...