The $140 is just the max possible, in reality it's likely less. Incentives for ROY, MVP, GG, All-Star, WS, etc. are figured into that max value. Yeah, we can hope he maxes out that value because it means he's probably one of the top 5 players in the league.
I'd also think there's a modest signing bonus to keep yearly values lower. I believe Jimenez got a $5M bonus which got spread out over his arby years.