https://www.motorbiscuit.com/why-toyotas-japanese-market-harrier-should-matter-in-the-u-s/ The Harrier for Japan is getting a PHEV drive train and would mirror the RAV4 Prime. The Harrier is the Japanese equivalent for the Venza in the NA market. Might get a smidge more or less AER than the RAV4 Prime because of the weight difference, but might pick up a little more efficiency with upgraded electronics. The Venza is currently rated at 39 mpg combined, the RAV4 hybrid is rated at 40 mpg combined.
Well it'll give the NX a run for its money. The RAV4 Prime is expensive and the Venza is already priced above the RAV4 Hybrid so the Venza Prime will definitely be into NX450h+ territory. I do prefer the interior of the Venza though.