Rumor has it that Pokémon Sun and Pokémon Moon could be announced during the Nintendo Direct scheduled to air Friday February 26th. The broadcasts main focus will be the celebration of 20 year of Pokémon. To reinforce the rumor, there is evidence that Nintendo had registered the trademarks in the European market, this evidence brought to us by NerdLeaks, who claim that those trademarks were registered today. A quick google query will also pull two new logos for the aforementioned possible games.
Perhaps this is all wishfull thinking, since there are also a couple of google results mentioning that Pokémon sun and moon are fan made games, and that this was all started by a parody account. But who knows Nintendo may surprise us yet, ooh, I hope they integrate this with the ever so popular amiibos.