A slither of a chance of such a thing happening, but if it did, I really do hope they introduce a Light Type to counter Dark Types. (And yes, people can say Fire and Psychic together would suffice as a Light Type, but why then do Ice types exist if they're really just water in a solid state? Why doesn't that apply in this instance?)
I've been contemplating the idea of a Digital Type...and eh...I'm a bit wishy-washy on it. Perhaps a Cosmic/Space Type? It'd definitely cater for Pokemon like Solrock, Lunatone, Deoxys, the Cleffa line, Starmie, Jirachi etc.