The pick is lottery protected in 2013. And the following information was added to Woj's updated article on the trade....
The Pistons' draft pick is also protected through the eighth selection in 2014 and No. 1 in 2015. It is unprotected if the deal extends to 2016.
So, this could net MJ a decent pick if Detroit continues to struggle a bit. It sucks for MJ if Detroit make the playoffs next year, because then Charlotte gets Detroit's mid or late 1st rounder. But, if Detroit misses the playoffs the next two seasons (quite possible), there is a good chance Charlotte gets a lotto in the 9-14 range during the 2014 draft.
Now, if MJ got really lucky, Detroit would suck hard for the next 3 seasons, the pick would remain protected in 2013 and 2014, and then eventually Charlotte would get a high lotto in 2015. MJ's paying Gordon $13 mill in exchange for the right to bet on Detroit sucking. Worst case scenario he pays a lot of money for a pick outside the lotto.