I'm not so sure that Stark would be interested in contributing to a company that the doesn't hold stake in, but I do agree that it wouldn't be impossible to keep SI functional and profitable without him. There are a lot of excellent employees here and I don't want to undermine any of you which is part of the reason I wanted to talk to all of you about this.
I do think internalized weapons, or projects that aren't for military or public use would continue, I think his idea -- and his main concept -- was just to shift focus towards reverse engineering some of the advanced technology he's already designed, and to focus some on generally improving this place as much as possible.