Well, teams would be starting at 858 points, which is less than the 1000 everyone else but the other late join teams started with. And there's 3 weeks left for this part of the League. The goal isn't to be the top ranked team, it's to be in the top four. Considering teams get roughly 100 points for every win, and more against the high ranked teams, you can actually catch up pretty quick. And if you're beating the top ranked teams, they're losing a lot of points. If Ouroborus Ryders lose a their first match next week, they'll lose 194 points, and if your team beats them, you will earn 131 points for both ships.
So it's entirely possible for an incoming team to wind up in the top 4. If the current top ranked teams don't do as well, all of them might not even be in the top 4 by the time week 9 rolls around.