As with the last waves of many Transformers lines, especially Movie toylines, we were not sure that the final wave of Power Battlers (Junheap, Vehicon, High Octane Bumblebee) would end up being released... but after much delay, it looks like they have been found in Asia.
A gallery of images of just Junkheap and Vehicon can be seen here.

Still not sure if they will show up at American sources like online stores, or even here... but if you are after these, perhaps keep an eye on ebayers from Asia.

(it is really rare for a final wave of any line to have all new moulds with no redecos... as the redecos are usually padding out the later waves in case the line doesn't last that long, which would waste all that investment in a new mould)