It needs to be A9X not A9 since A9 won't be better than the current A8X that's in the iPad Air 2. So, more than likely we'll get the A9X chip which is in the iPad Pro but slightly lower clocked.Some iPhone 6s plus specs:
3D Touch
7000 series aluminum
Strongest cover glass
A9 chip with M9
2nd-generation Touch ID
LTE Advanced and Faster Wi-Fi
Retina Flash
Stereo audio for landscape orientation
Combine that with the camera of iPhone 6, 3/4 GB of RAM, new speedy NAND storage which is used in iPhones 6s & iPad Pro and Apple Pencil support (why not?) and you have a solid winner. Take my money Apple.