Update 2 (18-04-2015): The new super saiyan forms and Frieza’s new form will be available in a DLC pack for Dragon Ball Z Xenoverse! (Picture at bottom of page)
Update 1: It has been announced that Vegeta also gains the new Super Saiyan form, pictures and fight scenes below!
For the new 2015 Dragon Ball Z movie, Dragon Ball Z: Resurrection F, Goku is going to be showing off a new Super Saiyan God form. In the 20th issue of Shueisha’s Weekly Shonen Jump magazine, picture of this new form were released alongside golden Frieza (but we all care more about Goku).
Goku is going to be rocking a light blue hair color as opposed to the regular Super Saiyan blonde or the Super Saiyan God red.
Story wise, Goku reaches this form after training with Whis (Whiz), master of Beerus (Bills). This raises the question of ‘How strong has Frieza become?’ For Goku to need not just Super Saiyan God form but a form that is one up of that! I guess we will just have to wait on the new movie to find out!