He's already started powering up
Dragon Ball Xenoverse 2 is getting Super Saiyan God Super Saiyan Evolved Vegeta as a playable character via paid DLC sometime this Summer, as confirmed by V-Jump magazine. Super Saiyan God Super Saiyan Evolved Vegeta’s “Final Flash” is quicker, and his “Final Blow” instantly teleports him to right in front of his opponent. New moves include “Atomic Blast,” “Final Charge,” “Flash Strike,” “Final Explosion” (Ultimate), and “Final Galick Rush” (New Ultimate). To unlock the Awoken Skill, you must obtain the “Super Saiyan God Super Saiyan” Awoken Skill, reach level 95, and max out your friendship level with Vegeta.