https://www.pcgamer.com/apex-legends-season-1-will-include-one-more-new-character/

The start of Apex Legends' first season saw the introduction of a new character, Octane—and one more character will arrive before the season is over, according to Sony's website. 

Sony's Apex Legends PS4 page says that "two new characters will launch over the course of the season", one of which is Octane. One new weapon will also arrive during the season and launch with a "full set of cosmetics to unlock", Sony said. The season is set to last around 12 weeks.