With the way things are looking I wonder if they will discontinue support for the CPP eventually, or just make it very, very optional or very few games might use it, maybe 1 game a year. Nintendo has a history of making peripherals where only 1-2 games use it.
I also wonder if they will release a new version for the 3DSXL model, which would make it incredibly large. If they don't then we can probably safely say support is dead or almost dead for it. If they were going to fully support it, I assume it would have been included in the new system, with owners of the regular 3DS having the option to purchase the pad separate as they do now so the user base doesn't get segregated.