“The top priority for the supply chain is to meet the overwhelming demand for the larger screen iPhones. The output of the 5.5-inch iPhone 6 Plus remains unsatisfactory,” the source said. “It would be challenging for display makers to split resources and spend a few months to ramp up production for a new larger screen iPad now.”
The WSJ also states suppliers are gearing up for mass production of a 12-inch Retina MacBook Air in December. Currently, Apple offers only 11-inch and 13-inch MacBook Air models that do not feature a retina display.
Rumors of a 12-inch Retina MacBook Air originally surfaced last year; however, its launch was reportedly pushed back due to Intel's broad well delays. Previous reports also claimed the device features a fan-less design and a new trackpad without a button assembly.
Apple is expected to unveil the new iPad Air on October 16th alongside new iMacs and OS X Yosemite.