Looks like the leaked designs of the magical girls for the 10th Pretty Cure series, Doki Doki Precure were accurate. Beyond that, I can't spot signs of the rumored playing card motif for the four mahou shoujo, but it is very apparent that magic mobile phones play a significant role in the series.
From the flyer promoting the series' February 3rd premiere

via おやつ - Smile Precure passing the baton

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Scott Green is editor and reporter for anime and manga at geek entertainment site Ain't It Cool News. Follow him on Twitter at @aicnanime.