Here’s an example of professional world-building:
The Future is Wild was a joint production of Discovery Channel, ORF and ZDF television corporations. It depicts three scenarios for the future evolution of life on Earth, set at 5, 100 and 200 million years in the future.
While there has apparently been some criticism of the scientific validity of the show, it’s still a pretty well-thought out design for the possible future evolution of life on Earth. And even if not everything is accurate – I am not in a position to have an opinion on this – it certainly sounds plausible and fairly consistent. Overall, The Future is Wild can serve as a pretty good source of inspiration for the aspiring world builder; especially since they explain why they designed the creatures in the way they did. Highly recommended.