ICAO flightplan replacing FAA domestic flightplan?
All the links are a bit old and seem vague.
I talked to a local CFI today and he said he hadn't heard anything in a while regarding this.
http://www.flyingmag.com/new-flight-plan-format-to-take-effect-in-january
https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/systemops/fs/res_links/media/icao_flight_plan_filing.pdf
http://ipadpilotnews.com/2017/01/new-icao-flight-plan-requirement-starts-month/
https://www.aopa.org/news-and-media/all-news/2016/january/20/faa-moves-forward-with-flight-plan-switch