Konami has announced that PES will have Live Updates that will be available for online modes (Online Divisions, Friendly Match Lobby, Team Player Lobby, Online Competition, Quick Match) starting on October 1st.
The updates will include stats for key players depending on weekly performances, and also allow you to use the updated rosters during online play. They can also be used for one-one offline matches like exhibitions and friendlies.
On October 29th the first Data Pack will arrive and will have the update rosters for all modes and make Live Updates available. This includes myClub.
The Data Pack will also add new teams to the line-up.
There will also be minor updates to improve gameplay issues that have been reported by players through social media.