You can also watch the video, which consists of extended shots of a record spinning on a turntable while the song plays. Snoop has been spamming random celebrities (like Lamar Odom and Randi Zuckerberg) with links to it on Twitter for a couple days.
As to why he made the jump from dog[g] to lion instead of wolf[f], it's likely due to the significance of the Lion of Judah to Rastafarian culture. (The Lion is regarded as a symbol of Ethiopian emperor Haile Selassie I, whom Rastafarians revere as the reincarnation of Jesus Christ.)
Snoop announced on Twitter earlier this year that he would be releasing his twelfth solo album alongside a documentary, so maybe it's a Joaquin Phoenix thing?
Or maybe this is just who he is now.