All that's left is Season 4 which I don't think has even aired yet.
Or been vaguely scheduled even, far as I know.
Nozomi has everything they can get anime-wise, and expecting a pre-license of Season 4 is a little risky sinc ethey don't know how the show will do yet. If the first three seasons do well then they'll do Season 4.
I'm surprised they went all the way to 3rd right off the bat.
I wouldn't want them to waste an announcement just tacking on another season of something they haven't started yet anyway. If 1-3 do well, 4 will naturally come in due time. Worry about that later. For now, there are hundreds of good shows that deserve a license, and I'd rather TRSI knock another of those off my list.