DragonBall Z: Revival Of 'F' (2015)

For those of you who are like me and didn't know...There is a new Dragonball Z movie coming out entitled "Dragonball Z: Revivial of F".

The new villain will be a fan favorite: Frieza.  From the trailer we see Frieza has been revived and stronger than ever.  The movie will take place after the Buu saga and following Goku's ability to transform into God Super Saiyan.

A brief trailer was released with some screen shots, and we can see Beerus is with the Z gang,  Each Z fighter has (Bills) Beerus or Whiss, the God of Destruction, symbol. So, we know that each Z fighter is trained and stronger.  The only questions I have are: who revived Frieza and why is he stronger than the Z fighters?

The release date for DragonballZ: Revival of F is April 18, 2015