Ah....... I have just recently seen an episode of The Future is Wild and I am in two minds, I cant judge the series as I have only seen the one part but so far the future looks really crap.
The part i watched (was on at about 2AM and after a bottle (or two) of house red) was the section on the Amazonian grasslands... IE once the Amazon rainforest dissapears.
There was nothing in this programme other than DEvolution... or stuff that has already happened... carakillers, babookaris and rattlebacks... All have had very similar things happen in the past of present... one advance was the catching fish in a basket theory.... Surely they meant that making this docu was shooting fish in a basket?

Give the people what they want? Make the birds look like dinosaurs again was the answer!
Surely imaginations, cause that's all it is, could have been exercised a bit better here? As it is all just theories why not really go wild on a savanah?
my suggestion is a carnivourous rhino type beast that is decendant from the possum that eats Carakillers... its horn is detachable and is used to spear prey. Growing to 3 meters tall, the Rhiposso has hands with eight fingers and its hair is blue... it lays eggs which are made of wood so that they dont smash when falling from such a height and the babies when hatched are winged and spend the first three years of their lives in the treetops.