Speaking with MCV, James Honeywell, DS Product Manager, shed some light on the future of DS/Wii connectivity:
"You will definitely see Wii and DS interoperability as soon as we have it finished,' said Honeywell. 'We haven't made any announcements over specific software for connectivity, but there are definitely a number of exciting things in creation which we want to bring to market as soon as possible. We're hopeful that will be next year."
"For example, the connectivity between Xbox 360 and PC is very much based in streaming video and other media. The link-up between Wii and DS will be much more about offering new forms of gameplay, fun and interaction. It will offer yet another new set of experiences for the whole family."
This comes after Nintendo introduced connectivity into Pokemon Battle Revolution. Is it possible we could see connectivity in future Mario and Metroid titles? Only time will tell.