I'm assuming Santilli was working on an assumption of a universe with a 50:50 distribution of matter and antimatter.
I am looking for a further 50:50 distribution of positive and negative mass. So 25:25:25:25 positive charge positive mass, positive charge negative mass, negative charge positive mass, negative charge negative mass.
I don't know whether you'd expect a whole galaxy out of each of these types. If I was inclined to speculate I'd go for galaxies made out of the mixture.