As the cosmos shank to nothingness around Naruto, he too soon found himself in white nothingness... at least for a little while. Like Kiba before him he started to see a wall of flesh form before him... and then feet... and then legs... and then abs... and then - Kiba! Kiba and a group of other huge hulking muscle-ninja.

"N-n-naruto?! You caught up to me!" Kiba said in surprise.
"DAMN right I did! And I'm gonna surpass you and these other losers too!" Naruto boasted, not caring anymore that quite a lot of other guys were this massive too.

"I wouldn't recommend that, new guy." One of the other ninja said. "A few of us have grown on ahead and... it actually gets pretty boring after a while. At least with nobody around." Some of the men nodded in agreement. "See, this Realm of Eternal Growth is a point where growth takes a stop for any ninja that gets this big. Heck, that's the only reason you stopped long enough to talk to us here. Sure you can keep on growing, but what'll it mean without somebody to share it with? Most of us end up just shrinking back down to this area here anyway. Though, we can't really 'shrink,' we can only condense our bulk, see?"

The man flexed his bicep... it peaked, and then another bulk of bicep bulged out on top of that. And another. And another. Then it all bulked out into one huge bicep rising above him. And it kept flexing up and up and up until this dude's bicep was a towering ball of pure muscle at least three times his size.

"It's actually a lot bigger, but you get the point."
"Yeah, it can actually be pretty fun experimenting with focused growth." One guy said, then grunted as his pecs and only his pecs bulked up for a moment before going back to the size they were. "But most of us around here just sex each other up and jerk off all the time. You haven't LIVED until you've had a cosmic-sized jizz. Never gets old. Heck, I've been here for 569 years."