Talking of the US, the Interceptor will be marketed there and Canada as the INT 650, I think Honda hold the rights to Interceptor in those countries.
As for the important questions - how good will it be? How much will it cost? When will I be able to buy one? - we'll have to wait and see. I know of someone who ordered a Royal Enfield Himalayan, but after months of waiting and numerous promises of delivery dates, it never arrived so he ended up cancelling and buying something else. If Royal Enfield want to be taken as a serious company, they have to address concerns like that.
Royal Enfield twins website, and here's a promotional video. Note that the bikes appear to have been developed at RE's R&D department in the UK.