Todoroki Shoto is the first character in the second season of the game Jump Force, and its release has been confirmed for May 26th.
Regarding the next characters to be released, what is known is that they will be from the following series: Hunter x Hunter, Yu Yu Hakusho, Bleach, and JoJo's Bizarre Adventure, but it is not yet known exactly which characters they will be.
Jump Force is available for PC, PS4 , and Xbox Oneversion Nintendo Switch is in development.