2nd Gen G class MY help

Hoping to find a G class insider/enthusiast on Fchat that can answer a question for me. I'm looking to trade my 14 G63 on a 17 because I want the last MY G63 before the wider, lighter, updated 2nd generation G Class becomes available. However, I've read conflicting reports of what MY the new one will be - most say late it will be a 2017 launch as a MY18, but a few reports say 2018 launch as a MY19 to coincide with the 40 year anniversary. My 14 only has 17k miles and is good as new, so I'm in no hurry to trade or sell, just want to be sure I have the last MY of the old school G.