Suite Precure will premiere in Japan in early February.
HeartCatch Precure was great and probably my favorite Precure series, but I am excited for the new Precure series titled Suite Precure. The two confirmed Precure's so far are Cure Melody and Cure Rythm.
Here they are:
They will also appear in the upcoming Pretty Cure movie "Precure All Stars DX3".
EDIT: Saw the first episode, very good, I don't know if it can top Heartcatch, but we'll see.