Order of size classes?

From smallest to biggest, it goes like this right?
Scout
Deluxe
Voyager
Leader
Ultra
Super
Supreme
I'm just wondering why the movie line hasn't released any bigger classes than Leader. We've already seen Ultra and Supreme classes before, why is Hasbro holding back? They don't want the movie line to be more epic?
Scout
Deluxe
Voyager
Leader
Ultra
Super
Supreme
I'm just wondering why the movie line hasn't released any bigger classes than Leader. We've already seen Ultra and Supreme classes before, why is Hasbro holding back? They don't want the movie line to be more epic?