Be thankfull he won't do anything with those characters. The great thing about many great series are that they end. Most of the time things are best just left alone. Be glad the trio are gone, otherwise they would have been in that M7 show we all either love or hate.
Ghost in the Shell Stand Alone Complex is getting a second season. My gut tells me just leave things as they were. If the second season sucks, it will bring the whole series down to a lower level. Of course, the people who love the Manga probably cringed when news of a TV show came about.
Cheers to Mospeada flopping and only getting a OVA. I don't want any more Mospeada story arcs. Don't mess with a good thing and screw it up.