Other than that, we expect to see Dr. Alchemy presented in a great, powerful light. The character has quite the notoriety among fans of the original comic books, so the producers of the show should definitely put a lot of effort into making his TV representation as impressive as possible.
We will also see various villains from the previous seasons show up here and there, but the season will mostly be focused on Dr. Alchemy and Savitar. Others could play more minor, supporting roles instead of taking up the spotlight, of course.
One of the great details about “The Flash” is the way the show manages to combine a variety of villains without making the plot feel crowded. It’s been a great source of entertainment for fans who enjoy seeing Barry facing a variety of different opponents with their own unique abilities.
With that in mind, we wouldn’t be surprised if there are a few extra villains prepared for season 3 that we aren’t being told about. It’s possible that the producers are hiding a few aces up their sleeve for the last moment, and it would also be entirely in their style. The comic books are a great resource for those who want to try making some predictions, but we shouldn’t forget that the show tends to steer away from that storyline quite often.