Just Dance 2015 is the follow up to Just Dance 2014. There’s no story of sorts to push the player through the routines, it merely throws the player into the game with a large majority of the songs unlocked.
The improvements introduced in 2015 do their best to streamline the experience previously presented in 2014, as well as improve the sense of community and social interaction between players. In that regards, it’s widely successful.
In short, Just Dance 2015 is the perfect embodiment of the mantra “if it ain’t broke, don’t fix it”. It’s improvements are iterative but it doesn’t break any of the components put in place in previous games.