The phrase "one's original announcement" refers to the initial statement or message that someone makes to inform others about something. Full definition
Some of the footage may be familiar, having much in common with the game's original announcement video. (nintendowire.com)
-LSB-...] original announcement post E-book Cover Design Awards web page Click here to submit your e-book cover Follow @JFBookman on -LSB-...] (thebookdesigner.com)
A lot of hype has circulated around this game since it's original announcement at E3 back in 2014, and since then players have been wanting to completely immerse themselves in the endless, beautiful, unknown regions of this PS4 exclusive, that has been in development for nearly 4 years. (provengamer.com)