This weekend, there was news that a dinosaur themed expansion would be coming next. A reddit user discovered this information when a Blizzard voice actress updated her resume on her personal website. The resume included a section under hearthstone for voice work on bunch of dinosaurs and a minion from a dinosaur themed area in WoW. That area is called Un'Goro, which is a crater filled with jungles and dinosaurs as well as other creatures.
Blizzard is also planning balance changes sometime during the end of the month (Source). It is expected that Small Buccaneer will be heavily nerfed. Blizzard has said in different interviews lately that pirates are starting to become a problem and they would nerf Small Buccaneer if nerfs were to happen.