Honestly. The selection has grown from just the next year season that they can adapt. It used to be a 1:1 ratio. Sentai airs it's current season. Power Rangers aired last years super sentai. Now we have a selection of seasons ToQger- Chances are probably fading away every year for this season Zyouhger- I don't know if it would be very marketable. The minecraft/ block mecha doesn't leave alot of ideas to implement it into a toyline Kyuranger- 10 rangers can yield alot of Marvel Legends type of figures thanks to Hasbro. Lupinranger VS Patranger- Cops vs Magicians due to the hat motif?