A random observation - now that Honda is pushing the CB300R with the very same 286cc single as our bikes I predict that they are going to stick with this engine, unchanged, for this class. Their revised 'entry sportbike' when they decide to facelift the CBR300R may therefore have a bit of a restyle with LED lights, a new digital display, lose a couple of kg, etc. for 2020 but be otherwise unchanged.
Im going to disagree but not just for the sake of an argument ha ha
I reckon now that they have updated the CBR500R they will probably leave it alone for a couple of years and if they are going to redesign any motor it will most likely be the 300R.
They already have the basis for a good motor in the 2017 CBR250RR that was released in Japan and South east Asia only. It is a parallel twin, but if they want to compete with Kawasaki and Yamaha head on then this is probably the way to go.
If Honda were to build a hot 350/400cc sports bike with some of the trick bits like @Sam R.
mentioned in his post then they would sway me back from my current Ninja 400 which has conventional forks and steel swing arm etc etc.
I'm losing faith in them though, they seem to have embraced the whole Neo Sports naked bike thing at present and the only sports bike in their line up getting serious technological upgrades is the CBR1000.