I had a blast with Dragon Ball Z: Kakarot when it launched earlier this year, but I'll be honest, I haven't been keeping up with my training. That was a mistake. I'm going to have to log some serious time in the Hyperbolic Time Chamber under intense gravity to get ready for the game's first boss battle DLC. It's literally god-tier. As Ryosuke Hara, lead producer of Dragon Ball Z: Kakarot, shared over at the PlayStation blog, the upcoming DLC features the first Boss Battle Episode (for Season Pass owners) and introduces players to …