Given how team-friendly the Acuna deal is, I wouldn't be surprised to see another 2-3 years tacked onto Freeman's deal at (or close to) his current salary. Does that push him a little further than some folks prefer to go? Sure, but it would line up perfectly with Goldschmidt's extension from St. Louis - taking Freddie through to roughly the same age.
If Freeman is extended I think it will be less than what most would expect it to be for. He seems to have that Chipper vibe.