For the release of Anthem, we already have a rough release date, at least a release window.
Anthem is the new “semi-MMO” from BioWare. At an investors’ conference, the game was already delayed by a year before it was presented. It was mentioned that the game would be released between April 2018 and May 2019. BioWare needs more time for the live service – that is, for what is commonly referred to as the MMO elements.
The release date of Anthem has now been further narrowed down.

Release Date Anthem: Fall 2018
On the official YouTube page for the game, the announcement states that the release date for Anthem is in Fall 2018.
So Anthem will be released in the typical “blockbuster, just in time for the holiday shopping season” timeframe. This will likely be September/October/November 2018.
By then, the first expansion for Destiny 2 will probably be in the pipeline. It could be exciting.
Interestingly, originally “Spring 2018” was in the channel description, but it was quickly changed. One could say somewhat pointedly: Typical, delayed twice even before the gameplay reveal.
More about Anthem:
Anthem: Trailer – New game from BioWare considered similar to Destiny