This is the part where it feels like the story got overworked. I 100% see your point and agree this is an attempt (a legitimate one at that) to tie back to Epcot's theme. I also see how people think that's clever. It's just too muddied and and throw away for me - since the pavilion's story is now Wonders of Xandar - i.e. focused on Xandar and it's fantasy technology vs. the actual solar system.
I have to wonder if the original plan was something more like the "Wonders of the Universe, presented by Xandar Technologies" where Xandar was playing the corporate sponsor or something like that. Telling us about the history of our solar system. Then, inevitably, something goes wrong and we have to go back through the creation of the Universe or the like to get a Macguffin, save the day, etc.
While I'm sure I would have been very against that at the time, given current situations, I actually would have been more ok with that story. And, I can completely see how that makes a very direct (albeit tongue in cheek) reference to both UoE and Epcot/EPCOT Center.
Again, I totally see how people are ok with this lighter reference. I hope those people can also see where that feels like an after thought to some of us. And, it's frustrating because story changes could make such a huge difference. Much like BatB Sing Along, Harmonious, etc., I'm beginning to wonder if these rewrites and what not are being pushed by a group outside WDI.