That is the promise of the ultimate save file. Just remember to back up your original data, scan for viruses, and respect the online rules.
However, there is a persistent problem that almost every player faces almost immediately after the tutorial ends: wwe 2k battlegrounds all characters unlocked save file
You are on Xbox/Switch (it's impossible), you care about online leaderboards, or you genuinely enjoy the gameplay loop of earning Buck through matches. That is the promise of the ultimate save file