Alright so somehow I'd never heard of this game before, but I saw the (entirely in engine and real time)trailer on RockPaperShotgun today and damn does it look good so far.
Trailer and info here- http://www.primalcarnage.com/website/
There's a fair stack of info on the game in there about character classes and general game design goals. From what they've released so far it will be a class based game with one team playing as humans and the other as various species of angry dinosaurs. There have been a LOT of mods in the works promising this type of experience in the past, but not only does this look and sound a lot better at this stage then any of those, it will probably actually get finished. They also provided this awesome chart displaying what class counters another.
Also judging from the trailer there would probably be some modes focussing purely on dinosaur combat.
Would love to see Giantbomb do some coverage on this. As an indie developer they wouldn't be able to put much into advertising and seriously rely on word of mouth for the most part.