So, stage 30 of the gauntlet is the final stage, but it's kind of lackluster. All's you get for completing it is the Fire God Liu Kang skin, and the Kronika gear'd Kung Lao skin (White, gold, and blue accents). That's it. Nothing else. It's just gone. Poof. You just see the completed tower sitting there in the middle of Towers of Time. I thought there'd be extra difficult challanges that are randomly generated, but payout good or a small cut scene or something, but nope. Once you hit stage 30, the gauntlet is finally over. I'm hoping they add new stages in the coming updates as the other towers are EXTREMELY repetitive. Same tower layouts over, and over, and over, and over again. Just different opponents. It really makes it hard to grind out koins, skins, etc.