Update: Pokemon Moon and Pokemon Sun have indeed been announced for 3DS for release in 2016.
The pair of 3DS games were unveiled during today's Pokemon Direct. The announcement wasn't a total surprise, as seen below.
More information will be released later in the year.
Original: Nintendo has revealed two trademarks in Europe for two new Pokemon titles.
Pokemon Moon and Pokemon Sun is the title of the games and although little is know at the moment, we'll surely find out more during tomorrow's Pokemon Direct, if as expected Nintendo make this announcement.
There's even some images doing the rounds, which look very Nintendo 3DS like. Although thats' speculation on our behalf.
We will update you on both of these titles as soon as we know more information.