The Unown are some of the most mysterious Pokémon in the history of the series, to the point where professors and scientists on the calibre of Professor Oak are baffled about how such creatures came to exist.
It seems that the Unown are on the move once more, as Pokémon Go players in San Francisco have noticed that three specific kinds of Unown (via. Pokemon Go Hub) have been hanging around the venue where the GDC 2019 conference is due to be held. GDC stands for Game Developers Conference and it has become a place where major announcements in the gaming industry are held.
The three Unown that can be spotted near the GDC venue just happen to be the ones that spell out the letters, G, D, and C. The Unown are expected to remain in the area until GDC 2019 ends.
There are several panels being hosted or participated in by members of the Niantic staff at GDC 2019, with Sam Villanueva speaking at the "Game Design Workshop" on the first two days of the conference, Rob Giusti is hosting the "When Trainers' Eyes Meet: Creating Real-Time Combat For 'Pokémon Go'" event, Laura Warner will be speaking at the "Basic Tools For Healthy Communities (Presented By Fair Play Alliance)" event, and John Hanke will be speaking at "The State & Future Of AR Games: Rose-Colored Glasses" event.
GDC has become an event where companies come to make announcements and the 2019 conference seems like it will be no exception, with Paradox Interactive seemingly about to announce a new Vampire: The Masquerade game during the event. There have also been a lot of rumors about Microsoft planning to announce that the Xbox Game Pass will be coming to the Nintendo Switch at GDC, but that has yet to be confirmed.
The fact that the Unown are being used to advertise the event may hint at a second generation of Pokémon: Let's Go! games being developed, though it may be a bit too early to announce them, as the Let's Go! Pikachu & Let's Go! Eevee games were only released a few months ago.
Pokémon Go still has a huge fanbase and the game keeps feature creeping in order to keep the players interested. The game will likely see a resurgence of interest in May when Pokémon: Detective Pikachu is released, so it's possible that Niantic has something big to announce regarding a movie tie-in. It's also possible that Niantic just wanted to use the Unown to advertise their attendance at the event and to give con-goers an extra bonus for showing up.
GDC 2019 is due to run from March 18 to March 22, 2019.