User blog comment:Chawk1993/Differences between Morgana's vision of Gwen's coronation and the real thing/@comment-4623180-20120109123931

It's just a dream. A prophecy, yes, but the prophecy aims to tell of what is forecoming- major events- not who is going to be there, or the looks or dress or anything. Since it was only everything Morgana had already perceived e.g. she hadn't met Elyan, perhaps it was a mix up of a prophecy delivered by magic and her subconscious. I suppose since lots of time had passed and all characters, as well as fans had grown, the wedding had to grow.