Apparently the 2016 Castle theme won't be seeing many horses as it seems to be based in space based off rumors. This theme is called Nexo Knights and seems to be the replacement for Chima. As posted on The Brickfan, here is some set info.
Knighton Disc Launchers (70310) – EUR 9.99 Chaos Catapult (70311) – EUR 9.99 Lance’s Robo Horse (70312) – EUR 19.99 Moltor’s Lava Launcher (70313) – EUR 19.99 Clay’s Blade Cruiser (70315) – EUR 39.99 Jestro’s Companions of Darkness (70316) – EUR 49.99 Ultimate Clay (70330) – EUR 9.99 Ultimate Macy (70331) – EUR 9.99 Ultimate Aaron (70332) – EUR 9.99 Ultimate Robin (70333) – EUR 9.99 Ultimate Monster Masher (70334) – EUR 9.9 - See more at: http://www.thebrickfan.com/#sthash.Ln3RdrO6.dpuf
And a wiki I made. http://nexo-knights.wikia.com/wiki/Special:WikiActivity