Heres pictures of what UDE has done to Rainbow Dragon.
Rainbow Dragon Ghost Rare Foil
Rainbow Dragon Ghost Holographic Foil
We can all rename it Rainbowless Dragon soon...
Edit: There are some info that the two foils are of the same rarity but of different angles. Whether or not this is true, it is still unclear. There are also rumours that the foils are of two different foils - Ghost Rare & Ghost Holographic. Any updates or accurate information on these please do inform me =)