I'm getting mixed signals regarding this. One the one hand, implementing such a feature would require a system update and Nintendo mentioned none of that during the stream. On the other hand, none of the three games announced during the stream are compatible with the Classic Controller Pro, so it makes zero sense to announce the feature alongside those three games if it only applies to Virtual Console games. Any of the games announced for other regions uses the CCP?
Pandora's Tower at the very least I know uses the CCP