Panasonic is likely to introduce Panasonic GX9 on Q4 of this year or may be Q1 of 2018. The most possible month for Panasonic GX9 arrival is September of 2017. The Camera will have decent upgrade in core specification. The sensor will remain at 20 MP resolution. The 4K mode will get 60p support and 1 stop increment in High ISO range.
Take this information with grain of salt
– anonymous sources