I should hope so, seems like they want all new devices to have 64-bit processing, maybe for preparation of phasing out the 32-bit ones 2 or 3 years later, looks like they have something big planned in the future for 64-bit.
So yeah, the next iPod touch most likely get a 64-bit CPU, probably the A7.
Of course that depends on whether they see a future for iPod touch.
They could come up with a new device category to replace the iPod touch, this is Apple after all, iPod Air? 😉