I hope they don’t replace either Fantasmic or Illuminations with World of Color.
The World Showcase Lagoon would probably be more suitable for World of Color, but it’s still not ideal with the little islands. I don’t think the World of Color theming would go well with Epcot, either… it’s essentially a larger, louder, more colorful version of the choreographed fountain in Future World.
I also can’t see them replacing the very popular, very expensive Fantasmic with World of Color. Perhaps the technology used within World of Color could be added to enhance Fantasmic, but I don’t think they’re going to be getting rid of their giant, audioanimatronic dragon.