1. One stage belonging to each franchise in Melee will appear in Brawl, with huge graphical updates and proper scaling.
2. Geno teams up with Luigi in SSE at one point.
3. Elite Beat Agents appear as an AT.
4. Non-playable, non-AT and non-boss characters still appear SSE's story for some particular reason; I.e. Rouge the Bat, Fatman, Goombella, Error, etc.
5. The Flat Zone version of Brawl will have a double screen design, to differentiate it from the original in Melee.
6. The next Wario stage will be set in Diamond City, with a mechanic similar to Delfino Plaza letting you visit various areas; I.e. Mona's Pizza, Wario's House, etc.
7. You can use the mic in the Wii-mote on WiFi matches with friends.
8. Every franchise gets at least one non-playable boss in SSE; those more important like Mario and Zelda get three, then those like Star Fox, Kirby, Metroid and DK get 2, and one-offs/ weird franchises like Kid Icarus, Ice Climber and Touch Generations get 1.
9. The DK Rap appears yet again, this time with a more 'gangsta' aesthetic.
10. Master Hand and Crazy Hand are really a part of the Ancient Minister.