Why are there only 20 characters?! Super Smash Bros. has over 30!
-Brawl is the third entry in the Smash franchise. The characters brought over from the past games are established in look and basic moveset. They are "Copy, Paste, EDIT" and voila= you have a foundation of characters before you even make a new one.
Something interesting here.
Lets see on rosters shall we. If going by the one character per franchise rule.
-Kratos / God of War
-Ratchet & Clank / Ratchet & Clank
-Fat Princess / Fat Princess
-Sweet Tooth / Twisted Metal)
-Radac / Killzone
-Nariko / Heavenly Sword
-Dante / DmC Devil May Cry
-Jak & Daxter / Jak & Daxter
-Sir Daniel / MediEvil
-Heihachi / Tekken
-Big Daddy / BioShock
-Spike / Ape Escape
-Sly Cooper / Sly Cooper
-Good,Evil Cole / inFamous 2
-Toro / Toro
-Parappa / Parappa the Rapper
-Sackboy / LittleBigPlanet 2
-Raiden / Metal Gear Solid Rising
-Nathan Drake / Uncharted
- Kat (Gravity Rush)
Total 21 - I count Cole as Cole and not two characters plus more will be added with DLC
Smash Brothers Brawl:
1. Diddy Kong (from Donkey Kong Country)
2. Pikachu (from Pokemon)
3. Meta Knight (from Kirby)
4. Pikmin & Olimar
5. Pit (from Kid Icarus)
6. R.O.B. (Robotic Operating Buddy — from Gyromite & Stack-Up)
7. Solid Snake (from Metal Gear Solid)
8. Sonic the Hedgehog
9. Captain Falcon (from F-Zero),
10. Donkey Kong
11. Fox McCloud (from Star Fox)
12. Ice Climbers
14. Link (from The Legend of Zelda)
16. Marth (from Fire Emblem)
17. Mr. Game & Watch (from classic Game & Watch games)
18. Ness (from EarthBound)
19. Samus Aran (and her Zero Suit Samus transformation after using Final Smash — from Metroid)
I count 19 but could have missed some. There won't be any DLC as far as I know.
Conclusion: All stars has the bigger roster that will continue to grow. But if you don't count DLC it's the same. For a first game in what I hope to be a series that's good stuff. If in a sequel they add two reps per franchise we could have a massive roster and the best part about it is each character feels unique and are not clones.