I think that thinking about these sets in BIONICLE terms like "canister sets" can be misleading. After all, not all the heroes are the same size to begin with (there are three $15 Toa and three $20 Toa), and besides, Lord of Skull Spiders already has the same price and the same box size as the $15 Toa (though, as a more Technic-intensive set, he has a much higher piece count). So for all we know the 2016 sets might start doing things like the Hero Factory Breakout series, with half heroes and half villains in each wave, spread across different price points.Also, keep in mind that we don't necessarily know all of the 2015 sets yet! We have only seen the 13 sets from the first half of the year. There are certainly going to be sets in the summer, but what they will be and how many there will be remains a mystery.Sorry. When I say Canister I simply mean six main good/bad characters, that's all. I guess it's also important to mention there were more sets in 02 than 01 and in 03 to 02. Bionicle never followed an exact pattern I guess