In 4 billion years, do we we have an idea of what the combined Milky Way and Andromeda galaxy pairing will look like?
In particular, will the presumed black hole at the centre of our galaxy, (and I guess there is one at the centre of the Andromeda galaxy also), have an effect on the morphology of the combined galaxies, before eventually absorbing them over the much longer timescale?
I assume that the Large and Small Magallanic Clouds, and other satellite systems of both galaxies, may be drawn in to the region.
I also wonder will the shape of both galaxies have changed, before they merge in 4 billion years time?
Will it be a collision (or I should say, in reality, a slow merger rather than anything dramatic) of two barred or elliptical galaxies, rather than the spiral armed galaxies we see now?
Although I have searched for duplicates on both PSE and Astronomy SE, (and on Google) I can't immediately find an answer to these particular questions, but my apologies if it has already been answered and I will delete this post if an answer exists.