I would not go anywhere near as far as calling him a stud, though.
I am optimistic on him for sure. I'm optimistic on Parris Campbell too, but he gets a lot of weird injuries and has done more than flash.
When he puts up several consecutive seasons of >1000 yards, in the ~10 TD area, >90 receptions... we can start the stud talk.
Old man Rivers had a bad year with San Diego the year before he came to the Colts. The O-line was good enough to keep him upright and gather in an 11-5 season. In the case of Wentz, the mobility he possesses and his relationship with Reich (which Rivers also had) bode well for him in 2021. To stay on topic, Wentz with these advantages should be far ahead of anything Fields might become as a rookie QB. I look for a good year even though the schedule is tough. The team is very young and should progress nicely as the year wears on through 17 games. Also the preseason format the Colts chose should make them fresher through the season. The dark spot is the very late bye week, but who knows at this point.