Pokémon Chest Teaser

The Pokémon Company is teasing a mysterious website on their Twitter. The site currently is showing an open, empty chest with the numbers 039 in the left corner of the screen. You can zoom in on the chest, but at the moment there is nothing to see. Earlier, the chest was closed and the number was at 000 like the tweet above shows. No word yet on when the next update will be or what's in the chest, but presumably this is for a new Pokémon reveal.