i think he could potentially be a star but i wouldn't go on to say he is a superstar
i mean when i think superstar, im thinking multiple all stars, a no 1 or 2 option on a contender, future HOF, a guy that can carry his team by himself e.g. KG leading a talent poor timberwolves to the WCF
There are only a handful of superstar players e.g. lebron, durant, anthony davis etc.
Russell doesn't have the athleticism to warrant that potential and he doesn't stand out in any one skill compared to other prospects that became superstars.