Hellcow
Adventurer
I'll do a blog post about this at HDWT sometime in the next week, but there's certainly ways. One major example would be the Blood of Vol, which has slowly been creeping closer to my original vision but started out quite far from it in the 3.5 ECS. For that matter, my interpretation of Baator in the most recent Eye on Eberron article ignores a number of pre-existing things (such as the mention of Levistus in the Player's Guide To Eberron or the description of it as a full plane in the ECS).I am not terribly sure how different a Keith Baker Presents: Eberron would be from the published campaign setting...
Of course, one of the key differences is that Eberron has always taken the approach that the DM should be free to overwrite canon. As such, "Keith Baker Presents: Eberron" would be just that - MY Eberron. It might not match the canon Eberron perfectly, but hey, YOUR Eberron might not match either one!