The idea was actually by Yoshimi, and a guy called Joe123.
Back in 2010 they started this game smaller and in ZC, with the same surreal setting and the world taking place in the dreamland / skyworld Aurelia. However, this project was later cancelled due to inactivity.
When I started working with Yoshimi, in 2012. -I was working with Time Walker, but with the lack of a good story and lack of interest we started to talk about renewing EoA again, with a better platform and new ideas. We made some concept art and Yoshimi brought the lore he had and improved it and when we had most of the stuff planned out we decided to start working with it.
Echoes of Aurelia was a concept that I really liked, and something I probably will keep working on as long as I have a team that helps me.
So yeah, the idea started in 2010 where it was cancelled and then renewed. As stated in the main topic.