The latest issue of V-Jump has revealed that Dragon Ball Z: Super Extreme Butoden, which is being developed by Arc System Works, will be releasing in Japan on June 11th for Nintendo 3DS. The recently revealed Golden Frieza will be given to those who pre-order the game. Additionally, having a game save of Dragon Ball Heroes: Ultimate Mission 2 in your system will unlock Super Saiyan 4 Vegeta.
A demo for Dragon Ball Z: Super Extreme Butoden will be included in the June issue of V-Jump and will let you play as Goku, Gohan, Vegeta and Majin Buu. Your save data will be transferable to the final game which unlocks a playable Revival of F Goku character and and will transfer your power level. Check out the scan below: