But the iPod Touch was updated yearly before they skipped a year. It's a tough call. I think it depends on how iOS 7 works on the current iPods.Who knows? But there isn't much rumors or news about it. It could or could not be, considering that the iPod Touch 4th gen was released in 2010, and then the 5th in 2012. But then again, I don't think so, because Apple is way more busy with other stuff. New iOS, new iPhone, new iPad, new iPadMini, new macs....
The change could be as little as the 4th gen going away and the storage capacities on the 5th gen changing. Or they could actually update the iPod touch.
For a September/Octoner release, I'm not surprised we haven't heard much on possible iPod changes since everyone is focusing on iPhones and iPads. And the new iPod parts (if any) could be mistaken for iPhone parts.