Aside from microtransactions (I believe the loot crate drops can also be bought) and ranked mode, apparently everything that was in the Beta is everything we're getting on launch.
From what I heard though, they're pulling a Splatoon and releasing a bunch of free content post launch over the summer.
I feel like this thread title should be changed to general discussion. Anyways, for Powerup Members at GameStop you can trade in one of the eligible games on the list and grab this game for $35. Sadly, the only one I wanted to trade in I traded in 3 days before this deal was offered. Still really excited to pick it up.