You figure that 'wind' might be going into more a typical RPG format for types, in addition to which it might come off as slightly weird given that there's a flying type and such. Also figure that 'Artificial' is a bit misleading, evidently a Pokemon which is artificial can nonetheless be created as a Pokemon with a type, and it seems a bit like some of the things suggested might be more classifications or labels than types in the sense which they currently exist. In addition, Mewtwo hardly needs another type to describe parts of their film since Dark and Steel. That said, while I'm not sure that they've added any types to the games since Gen. I which are well-implemented as well as decently-named, and a Light type risks going into too much of a Paladin-esque opposition involving the Dark type and so on from elsewhere in the game - or alternatively invites further accusations of Satanism if the series were to become relevant again - there could be some mileage in going with the general trend of the series' names and creating a type based around an element, a stone, or metal, etc., which might stand out as fairly unique.
