I'm afraid I don't follow.
For a while now there has been speculation of a new type (Light-Type) and I'm just poking at the fact that maybe this Eeveelution might be Light-Type rather than Flying-Type like everyone assumes.
The reason I think it will be Light-Type if there is a new type is because back in G/S/C when they introduced Dark/Steel, we got Umbreon.
Before anyone says, "there are already too many Pokemon for them to introduce a new type." That's not true, if you take into account that there may be more Pokemon in this gen than in previous gens. Consider the possibility of the added evolution to previous Pokemon in Gens 1-5. There's is plenty of ways they could balance out the amount of Light-Typed Pokemon.
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This is just speculation though, I just think it's fun to think outside of the box. Makes things more interesting.
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Light doesn't exist, and it would be stupid for developers to introduce it this far into the series' lifetime.
Please see my reply to Edoc'sil.
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The only Type that screams at me when I look at Ninfia is Flying. I guess Normal is a possability, but I don't think it is. I highly doubt it will be a new Type or the other existing Types.
Normal = Eevee, this Pokemon has no chance of being Normal-Type. No Eeveelution will. It would be stupid for them to make a Normal-Type Eeveelution.