Can't see SR joining the Sk*Team. DL / SR / SN / OS had a good partnership with "Atlantic Excellence." However, when DL started looking toward AF, it broke down. SR made it very clear that it did not want to be allies with AF.
I agree with Rudi - I would think it would be very likely that SR join oneworld with SN. Don't think a LH link is too likely. The European Commission would probably not look too fondly at having 8 European airlines (SR, SN, LH, OS, Lauda, Tyrolean, BD and SAS) all in one alliance.