I've seen a lot of discussion on this point, but no authoritative conclusion. My take on it, based on incomplete evidence -- that is, my somewhat speculative opinion rather than fact -- is that Mitsubishi had limited battery cell availability, and so could not supply every market. Since the U.S. market has higher safety standards, that means Mitsu almost certainly had to make some changes in the model to sell it here, which would drive up the unit cost. There may also have been an issue with the currency exchange, with the U.S. Dollar being so much stronger than most other currencies. All in all, if the Outlander PHEV was production constrained for any reason, it makes sense for Mitsubishi to delay entry into the U.S. market, so long as they could sell every unit they made in markets more profitable to Mitsubishi.