Anthem, announced back at E3 2017 and has a release date for February 22nd 2019, now has a demo confirmed. EA has now confirmed this. The demo will be launching 3 weeks ahead of the release date.
With all of this being said, if you want access to the demo you will have to pre-order the game or simply subscribe to EA Acess or Origin’s Acess. That is the only way to play Anthem 3 weeks ahead of launch. You can watch the new Our Story Trailer Here