If Rhodes leaves Indy then I expect Addai to become the primary RB with around 300 carries. They will have to bring in someone (FA or draft) to back him up but why would they want anothe big salary when they have their guy? Addai is a surefire first round pick next year and might even be top 7 in PPR leagues.
Again, careful with this. This happens every year with rookies from the previous year that showed flashes of good play. More bust than don't. I'd rather have Rudi Johnson than Addai every day of the week.
I'd say Addai did more than show flashes - he showed he's a complete player, and carried the load in at least a few games. For the season, without looking at the numbers, I believe he logged over 200 carries. Yes, there's some concern about how he could handle 300 carries, but that's about 5 more per game than his rookie workload.And let's face it, with the system and surrounding talent, he's certainly in a position to succeed.