Need more context to answer accurately:
Is this a max extension this summer or actual new contract next summer?
Did we upgrade the team at all this summer with a big free agent or trade?
Did we keep the Brooklyn pick? If so, where did it land, and who did we pick?
These are all essential pieces of the puzzle that will determine that answer.
These are all critical questions.
My guess is this: if they land the #1 pick, someone is going to make Danny an offer he almost can't refuse for a young All-Star with control for 2+ years. Then -
and only then - will we find out Danny's true intentions for the next 5 years.
He either says (a) no way, which means he is trying to build a dynasty starting in 2020, or (b) yes, which means he is all-in on the IT-Horford-Crowder-Smart-Brown core (possibly Avery too).
If it is (b) then IT will be offered a max-extension this offseason. He will accept, because it would be stupid for him to play out a full season making 80% less money when there are all sorts of possibilities for injury or bad stats.