These things continue to haunt me...I can't imagine they would have been cancelled, with all the tooling costs incurred, DVD production, etc, but the extended delay is mystifying.
I think it's a very Q&A worthy question. Habsro could at least confirm whether the domestic versions of these things were actually produced or not. It's possible they made them and handed them off to Wally and have no clue beyond that.
I have not noticed peg space for these in the Walmarts that have reset near me, but I will be sure to check next time I go.