The official Pokemon GO Twitter account has announced that the Pokemon GO Community Day in both September and October 2020 will feature Porygon and Charmander respectively. These two Pokemon were the ones who received the most votes from users in a recent Community Day Twitter poll. More details will be shared by Niantic and The Pokemon Company in due course.
Kinda lame how 3 of the 4 pokemon in the vote already had their shinies released