Well, I have to say that this mod has been quite an experience for me. This is my biggest project thus far, done in collaboration with Ecliptic over at JPLegacy, and I'm honestly impressed that it was able to be finished within a year.
The mod will release in December for all of you to enjoy; upon release, it will come with two DLC packs: In Memoriam and Unholy Matrimony. What exactly do they feature?
In Memoriam features the bonus dinosaur Crichtonsaurus as a 40th dinosaur, rounding off the number of dinosaurs from 39 to 40. It is a tribute to Michael Crichton, without whom none of this would be possible.
Unholy Matrimony however offers you the chance to breed both male and female Tyrannosaurus. Due to the game's limitations, the female T. rex is considered a separate species from the male, and hence she is the 40th species of the game.
Unfortunately, the game has a limit of 40 dinosaur species, so the DLC packs will be mutually exclusive. As for future DLC, I have planned a dinosaur skin pack... among others.
With that said, I hope that you will give this mod a try when it releases. For the impatient, check out the mod thread here for details. Closer to release, the ModDB page will be updated with a bestiary showcasing each and every species of the mod, so keep an eye out!