I don't think Chelsea will be competing for the EPL title next season, they have a lot of ground to cover before they can challenge for the EPL title again, they have a new manager, too many new players that are yet to adapt, and a 'new' hierarchy at the club that's yet to understand how football works (i consider Todd Boehly to be clueless about the beautiful game). Thus, next season Chelsea will be in the race for a top four finish, and if they can add one of the domestic cups to it (either the FA Cup or Carabao cup), then it would be a good first season for Pochettino.
With the right Manager Chelsea should be among the top four next season but I doubt they have the right manager. They have a manager that will make them but I don't think he will make them into a team that will be in the top four, not to talk of competing for the league. The season is going to be very competitive, with Liverpool and Arsenal making big moves. Tottenham also look like they know what they're doing then there's Newcastle, while Manchester City will keep being Manchester City.
Pochettino will try his best for Chelsea, but u feel his vest would be a Europa League spot.