Those were fun times. Checked every day to see what was updated, even though most of the time it wasn't all that much. I'd have to say the most exciting thing for me was Pokemon Trainer, since I hadn't even thought o that. I mean, pretty much everyone else I had seen speculated, including Red as a standalone fighter, but not three Pokemon being switched by a trainer. I kind of wonder if he got completely scrapped from Smash 4 due to the handheld version not being able to deal with too many switching mechanics, or if it was just the design decision to not include that anymore which meant only Charizard got to carry over.
Thinking about it though, Brawl really did add a lot. I think it gets looked on unfairly sometimes, though I won't deny that Melee felt better even from my only slightly competitive point of view.