Marvin is already fighting an uphill battle terms of expectation that goes beyond him simply being a number 2 pick. He's now known as "the guy chosen over Luka". As right or wrong as that may be, it is what it is. Bagley putting up 25 and 10 every night is probably a baseline for him not to be considered a failure to be honest. The issue with that is in order to do that you need a sizeable chunk of the offense. Right now even without Marvin no single player is getting that kind of share of the offense. So, unless Fox, Buddy, Harrison, and Bogdan all take a major back seat individually, there is almost no way for that to happen. For him to even have a marginal impact on the team as is he'd have to become a legit stopper defensively. Like Ben Wallace level, and even so, in terms of perception people will still consider him a failure individually from a production POV.