I too like that idea. Boot up the game on Monday and you're chowing on delectable four-eyed moose-monkeys (or something) but if you, unlike I probably will have by the tie it comes out, actually have other things to do apart from play Spore (shock, horror!) and can't come back until next Monday, the moose-monkeys might have larger mouths to gulp you down whole and huge claws to scratch you up reeeeeaall good. Gives the illusion of a persistent world, too.

In that picture of all the creatures it's clear that some of them could have originated from the same species.....of course, they're all manmade and not game-made so it's not conclusive evidence that the game can create divergent species. Would truly be a benchamrk in coding if the AI could do that though. You never know. Unless you do, at which point well done.

Additionally, something I'd like to see, though is hardly something that happens on Earth that I know of but may help gameplay, is if you exclusively hunt one species doggedly they get cross with you and you might get attacked by a herd of them out for revenge. Not necessary, I just thought it might be funny. Unless it happened to me, at which point it's annoying. Like the chickens who attack Link if he slices them with his sword too much in Zelda.
Finally, hives and hive mentality has been mentioned countless times so I'm not going to repeat that, but I would love to see queen-bee type matriarchs of the species...kind of the main female/male (adjust as appropriate for race) who must be protected at all times, and your goal in the survival stage is to impress her/him enough to win breeding rights to win extra evo-points to spend on future generations. Impressing cold be done by taking down a large animal that often kills your own kind, or by fighting off rivals of your gender, or even by doing something like the best procedural dance.....
