I think if American Honda Motor Co. thought that there was a significant market for the CB223S here in the U.S., they would already be importing this bike. The reality is that in the U.S. there is not a big demand for a bike like the CB223S.
That the CBR250R was so successful (and not just in the U.S., but worldwide) was due in large part to the fact that it is a modern bike with EFI, liquid cooling, sport bike styling, great fuel economy, affordable price point, etc. All of this despite it being a single cylinder 250... which let's face it, sales of small displacement motorcycles in the U.S. have been in decline in recent decades. Sub 500cc bikes certainly had their hay day back in the '70's and '80's, but then the market demand here shifted to mainly larger displacement cruiser style motorcycles in the 1990's.
Obviously we are now seeing a huge resurgence in the popularity of the sub 500cc motorcycle class for a variety of reasons, the squeeze on the global economy being one of the most significant driving factors. But, I don't see the vast majority of today's buyers for these small displacement bikes wanting to go backwards 30 years in terms of technology... today's buyers want, rather demand, all the features and benefits offered by modern motorcycle design & technology.
To use an analogy, I don't think you would see a whole lot of people rushing out to trade in their state of the art iphones for the big, cumbersome 'suitcase' mobile phones of the late '80's, or rotary phones of the '60's, even if a phone manufacturer decided to bring back that low tech equipment.