Here's a snippet from the Polygon article:
"Apex Legends’ ranked mode will see changes in season 4 as well. During the stream, senior gameplay designer Chin Xiang Chong said ranked play will be divided into two periods, with the first beginning with the new season. In the middle of the season, that split will end, resetting progress so players can start over in a second ranked split. Both splits will take place on different maps. The first puts ranked players on World’s Edge and the second re-introduces Kings Canyon, the map from Apex Legends’ first two seasons. At the end of the season, the ranked rewards that players receive will be based on the highest rank earned across the two splits."
Source: https://www.reddit.com/r/apexlegends/comments/et93rk/the_return_of_kings_canyon_in_s4_confirmed_but/
