Season 10 of Overwatch has begun. Season 10 follows the same guidelines as the previous seasons. That being players must be at least level 25 to compete and must have finished their 10 placement matches before being able to obtain their initial skill rating.
This newest season also features newest playable character Brigette for the first time. Only time will tell how Brigette's skill set meshes with the current top teams and teams overall. Had Blizzard waited, the newest map, scheduled for release very soon Rialto could have been included. However, it is likely that Blizzard wanted to test the map live for a period of time before adding it to competitive play.