This one makes my brain go "WHEEE!!!" I find it very innovative, yet also somewhat limiting, so that while I can be imaginative in my creations, I also know that I cannot take anyone from post-1920's at latest and that the tech will be steampunkish or crazy Ether-tech in nature. This means to me that the setting does indeed give you a path to start on when you first find it, which I think is vital for any new game setting.
The concept is novel to me, especially in its approach. I know there have been many superheros thrust back into an odd prehistoric past or settings like Land of the Lost, etc, but this one feels unique to me in it's use of temporal travel through "Ether" and historical characters twisted. Many players gravitate to and will want to play the more weird and esoteric possibilities of a game system; this system allows those parts to be as much mainstream as any other player who prefers a more "vanilla" PC.
As for inspiration, hooboy. I can think of several historical figures that I think would be fun to figure out how they live in this new world. Does Nero have some sort of "Pied Piper" Ether power and is trying to rebuild a new Rome with essentially emotional automatons? Does Jesse James and his new gang have to thread the needle of evading the wrath of the people they steal from while also avoiding capture by the Troglodyte hordes whose caves they escape into? The possibilities abound!
The writing is well expressed and concise. I think some things could be expanded on, but for a beginning this is exactly what I'm looking for in a setting concept outline. It even comes with tagline included.



Please Review All Top Contenders!
Now that we're getting down to the wire and the top contenders for selection are becoming apparent, I heartily encourage the entire Swarm to PLEASE REVIEW ALL TOP CONTENDERS.
Regarding This Union Pangaea, I've noticed that folks either seem to really love it (thank you, love you back), or really don't (thank you for being honest). I wrote it intending that it be exciting and evocative, and so I'm not surprised that it generates strong reactions, depending on whether or not it is your particular cup of tea.
But please, Please, if you've given a strong rating (either in favor or opposed) to any of the top contenders, do right by the Swarm process and cast a vote for all other top contenders with similar honesty. That way, when all the information is compiled the voting will best reflect the preferences of the Swarm.