Calling either one a "hit" might be stretching it. And... yeah, that's stupid. 300 would make a great action game if you look strictly at the fact that there's a lot of violence, but there's nothing else to add to it. And making a game out of it would destroy any art the comic had, which the movie already sort of did anyway (I liked the movie to a degree, but it doesn't hold up to the comic even a little bit in hindsight). In other words, it's just another period-set action game. At least, that would be the logical guess. You don't base a game on an action movie and make it not an action game.
And Saw? No. There's little they could really do to make it truly unique unless it was a hybrid kind of puzzle game, which it won't be because nobody makes true puzzle games anymore because they know they won't sell... or they could make it a Dungeon Keeper-style affair where you build wicked crap and watch people succumb to it. But... yeah right. It won't be that either.
My guess? Brash Entertainment makes a few games that all suck, they sell enough for them to stay afloat because the world is full of idiots who buy stuff based on the title, and they eventually fade away into nothing and nobody ever hears from them again.