Honestly, if you go back and watch the original 46 episode series, there was a lot of filler. 26 episodes is more than enough to cover the first story arc without skipping anything.

Also, they very well may go past the first story arc and get to the Black Moon/Infinity/Dream/Stars arcs, but I'm guessing that'll depend on how successful the first arc turns out. I sure hope they go through the other arcs. Super S and Stars, while great, really didn't do the manga stories justice at all, and need a do over far more than the first arc does.