Not sure if this is a topic yet or not but here is the link:

http://exophase.com/game/playstation-all-stars-battle-royale-ps3/trophies/

:( This seems to point away from unlockable characters.

Yea, unless Sony is actually keeping it a secret there will be unlockable characters.

Looks like a fairly easy platinum especially with 3 friends that have PS3s.

I still have hope. Why only 20 characters rosters with so many more possibilities? Unless they plan to bombard us with DLC characters which I'm not crazy about.

They may be keeping them as dlc characters for release later. At some point Im sure they will put in other characters - it makes too much sense not to. Especially with the amount of griping thats been going on over the missing characters, AND some of the lesser known present characters.

If they really wanted to keep that a secret, they could have just done a better job at keeping the roster list secret.  Besides, if the game had more awesome characters why be coy about it?  It's a selling point that I wouldn't keep secret if I were them.  Just my opinion of this.  could be wrong.

Game has 20 characters confirmed a million times over.

On topic the trophies look good. They are much more about exploring the game which is how trophies should be.