Depends on how you want to think about it. Officially, yes, instead of 1 40 episode season there are two twenty episodes seasons. However, it really is only one season. The whole reason they are doing this whole two season thing is so that they have to skip adapting the current sentai: Kaizoku Sentai Gokaiger. This is also why they are counting that awful version of MMPR they released last year as the 18th season. This way, even if they end up not counting Samurai as two different seasons, the anniversary season would be Goseiger and not the proper anniversary season, Gokaiger.