I realised this morning that the SW galaxy "now" might be even more different than I speculated.
There is a passge in one of the NJO books, during the search for Zonama Sekot, where Danni Quee explains why hyperspace travel is so difficult in the Unknown Regions, saying that it may be the result of a collision of interaction with a "dark matter galaxy."
If that process was ongoing (and I can't see why it wouldn't be) then after 11-50 million years it's possible the dark matter galaxy completely mergedwith the SW galaxy, rendering hyperspace travel virtually impossible over long distances. Galactic civilisation will be very
different if this is the case.
On the matter of where the SW galaxy is, this image
shows the nearby galaxy groups. Since the SW galaxy can't be within the Local Group, the closest it can be is the M81 group. If not there, it's the M101 group at 24 MLy, or the M51 group at 31 MLy.
In fact, I can say that it isn't in the M81 group, as the SW galaxy is known to have seven dwarf satellite galaxies, and no MW-sized galaxy in the M81 group has that number of satellites. (I don't think any in the M101 or M52 groups do either, pushing the SW galaxy further and further away.)
Suffice to say, if we saw that galaxy "now" it wouldn't even be the SW galaxy anymore. Stars and worlds will be in different places and all the history we see in the EU and films will be long forgotten.