Potential?
I'd say it is a mix of Dwight Howard, Dirk, and (and who else did Kanter describe himself as???)
Personally, I think he should shoot for Luis Scola. A dude that eats rebounds, is very active, can hit the jumper, and can score a lil in the post. These comparisons to elite players need to be shelved for a few more years. Not too realistic. But comparisons to good role players? Sure.
Personally I think this is closer to Kanter's floor. The other upside is Scola is barely 6'9". Kanter is 6'11".