Sakurai, director of the game, is bullish on AI for game development [2]

Your source is based on machine translation, and professional translators pushed back on the interpretation that he is enthusiastic about genAI. Apparently it came across more as resignation that AAA developers may be forced to resort to genAI in order to sustain the endless scope creep and content bloat endemic in the AAA space, which has led to the current absurdity of it taking an entire decade to make a new GTA game.

https://kotaku.com/ai-translation-of-smash-bros-directors-co...