From an article this morning in Le Monde:
SNCF and DB are launching a direct TGV between Paris and Berlin as of Monday, December 16.
It may not appeal to many people, because it will still take more than 8 hours. But there will be lots of folks who will be glad to have this option.
There will be one train each day in each direction. The trains themselves will be ICE trains.
The train will go via Strasbourg. If you google “Le Monde Paris Berlin TGV” you won't be able to read the article because it's behind a paywall, but the map should show up so you can see the planned route, also via Frankfurt.
Also according to the article, SNCF and DB are planning to increase the current Paris-Munich from one in each direction daily to five. This route takes a little bit less than six hours.