Anyone wish to speculate what would have happened had the Grey Council Fleet reached Z'ha'dum? Do they think their stealth technology is enough to hide from detection by the Shadows? It seems they would have had to look pretty closely (especially back then) to find any evidence of Shadows - since Z'ha'dum still looked mostly like a dead world ten years later, the Shadows not wanting anyone to know they were active again. If they discovered the Minbari snooping, would they have destroyed the fleet to not let the information escape (though that should mount an investigate on the part of the Minbari when their entire higher government goes missing; maybe the Shadows would blame it on the Humans, heh, and start the war) or if any did escape with news, would the Shadows up their time table? Delenn said they had to pretend they knew nothing or the Shadows would move early and before the others were ready.
So, in short, was going to Z'ha'dum a bad idea that luckily didn't happen?