Every other month we will see a Community Day for one starter pokemon. For Gen 1 the order is Bulbusaur -> Charmander -> Squirtle (March, May, July). Now as it moves on to Gen 2 and assuming the same order, we could expect Cyndaquil's CD in November and Totodile's CD in January next year.
As for the performance of these pokemon, you can refer to the previous post "September CD Frenzy Plant announced!".