Here is the list of expected champion buffs for Marvel Contest of Champions.
Magneto – Overhaul – v28.1 – Expected August 31
Magneto Marvel Now – Overhaul – v28.1 – Expected August 31
Punisher 2099 – Tune-Up – v28.2 – Expected October 6
Gambit – Update – v29.0 – Expected November 2
Falcon – Update – v29.0 – Expected November 2
Release dates are approximate and based on the expected release date of the given update. To be clear, these are my best guesses based on the information currently available. Precise release dates are not generally revealed by Kabam in advance.
Champion Buff Key
Tune-Up – Numbers improvement, no ability changes
Update – Numbers improvement & minor ability changes
Overhaul – Full champion rework
Previous Champion Buffs
Old Man Logan