I would hope that there could be a farmyard set, a safari set, a forest set etc.
And I only want to buy animals I am not interested in them as part of a bigger set. This has been my problem with the forest rangers set - I would LOVE that bear but I'm not buying a set I don't care for for it, and its expensive on bricklink, though that could be what I do. More of the existing cows/goats/chickens/bears would be really useful too if you could buy them without buying construction sets where they are one item amongst many bricks.
My top 5 and this is hard:
Deer/Stag/Reindeer type - maybe antlers are new bone type mold at detachable
...Elephant - yes I know thats #6 but I can't leave it out
But a non-friends version hedgehog, turtle, fox, donkey, giraffe and tiger are really appealing too. In fact most animals are! I would want just about any animal they produce
Edit: Agreeing with other - fantasy. That centaur should have already been done when HP was out.
Edited by Cara, 14 June 2012 - 06:26 PM.