Maybe we'll see a mix of 787 and A321 service on AKL-SYD - perhaps with 787 service timed for early/late peaks or to coincide with the longhaul flights to/from AKL, then 321s for the rest? Assuming NZ adds J to the A321s, that would at least allow business class on all flights, which would probably make sense on the region's busiest international route for business travel. It would also allow for some capacity growth.