One season to adapt maybe but I will be very surprised if he won't be better than Rodrygo at least, and that's my worse scenario.
Based on? Rodrygo looked better than Endrick in 2017-2019(16-18 years old; Endrick will be 18 in 3 months).
He's been decent, but not great for Palmeiras. In fact, he was below average(saying he was really bad wouldn't be an overstatement) most of 2023, until the last two months of the season. He also had an average pre-olympic tournament some months ago.
Yeah, he's only 17 years old, but when people start to claim he's the next Pelé, Ronaldo, Neymar, etc, it'll be pointed out if he doesn't look nowhere near that good(did you watch any of these guys playing at Endrick's age?).
He apparently has a much better mentality than our "craques" normally have and also has a very good game reading, especially for his age, but technically he's nothing special(Gabriel Jesus looked better on the ball when he played for Palmeiras). His finishing is very suspicious too(again, I'm comparing him to those he's supposed to replace; 17-18 years old Neymar was a MUCH better finisher, let alone Ronaldo or Romário).
All the hype around him is based on what he did in sub-20 football and, as all of you can see, he has an abnormally developed body for his age.