So, looking at the pokemon X/Y one, i'm hoping it follows a similar pattern.
https://www.youtube.com/watch?v=BDo5qFREiss
1. History of smash bros, evolution of the series
2. Going over 'core elements' of smash bros, and what sakurai felt was important to include in the game.
3. Show off Online features - showing off the options and details about 'For Glory'
4. More veteran reveals
5. Showing transition to HD/3DS, talking about transitioning from brawl assets to a new game
6. Show off a new gameplay feature, or show off smash run some more.
7. A trailer for one more newcomer
8. Show off a match using the newcomer
9. QA session
Yeah, I probably worded my post in a confusing way, that's exactly what I was trying to point out to R0ckman, that newcomer trailers aren't spoilers.
I want all newcomers to have trailers, even if it 'spoils' it for some people. The trailer is always super cool, we get some really cool art, and it's just fun. I hope even newcomers like wolf/toon link in brawl, who were 'last-minute subspace' unlockables (not featured in the story of subspace), get proper trailers as well. Wolf/toon link feel like they were either added in last, or something, due to lack of presence in subspace.