Man, what a game-changer that would've been! If Fukasaku had started training Naruto before the Chunin Exams, I bet the whole arc would've veered into wild territory. Imagine Naruto mastering Sage Mode basics early—no more relying solely on Kurama's unpredictable chakra. He'd probably obliterate Neji with actual technique instead of raw power, and that fight against Gaara? Forget sand shields, we'd get tophat-and-cane frog kata theatrics mid-battle.
But here's the spicy part: how would it affect his dynamic with Sasuke? If Naruto showed up dripping with sage swagger instead of just knuckleheaded determination, Sasuke's inferiority complex might've detonated sooner. Plus, Tsunade might've taken notice earlier, fast-tracking his growth. Though honestly, half the fun of Naruto's journey was watching him stumble upward—early Fukasaku training could've robbed us of those beautifully messy growth spurts.