As things stand, I expect IT and Lee to be our leading scorers. Each could average in the high teens at least on this team.
I think Marcus can average 11 or 12 points a game if he's given something close to starter minutes and a larger role in the offense this year, but that's about it.
From Marcus, I'd be happy with a statline something like:
11.5 points, 3.5 rebounds, 3.5 assists, 1.5 steals, 3 FTA, 1.5 3PM, 40% FG / 33% 3P / 70% FT