This both is and isn't inspired by actual Fable 2 nonsense.
Cosmetic potions (height change, weight change, scar removal, etc.) being exclusively sold on an island that's part of paid DLC? Yes, 100%.
There being FREE DLC? As far as I can recall, no. There were pre-order bonuses if you wanted to dress up like Master Chief or play pub games, which sort of counts? In a way? Because it didn't cost extra, you just had to commit to getting the game early?
It counts enough that this is totally fair parody, in any case. OBVIOUSLY.