There could be 2 systems and one small that connects them together. 2vs2 teams could begin with 2vs2 colony ships in the central system with no planets or asteroids and they have to go to the 2 bigger systems(THEY must chose the nearest planet and system cooperatively.)
Yes, thats one possible map type. Though I don't understand the bit about "2 systems and a small one that connects them together" -- are you talking about something like Fire and Ice, where there is a central "arena", with two lines heading off of it, only having those lines heading off be based out of one side or the others territory?
On the other hand, we've been promised the return of customized random maps -- and adding the controls to handle this situation was, if not promised, then strongly hinted.