BOA's desion making processes have NEVER made sense.
What I heard was that Bandai thought the toy looked too "evil" for kids...or something along those lines, yet they released a 5 inch figure of Koragg. It was a toy of a villain and we know how Bandai feels about them: "they don't sell." I suppose especially at a megazord's price point.
I believe though they were considering a release as an exclusive, possibly toys r us, but that obviously never happened.
If BOA made a Wolkaizer toy it would look like a piece of ****.
The OO Zords were crap anyway though, not worth buying at all.~SNIP
BOA's desion making processes have NEVER made sense.