This is the fate that awaits the Milky Way and the Andromeda galaxies, but at least none of us will be around to witness it. Intelligent life may still exist in some form by then, but not likely anything that we would recognize as human.
Here is a Java applet for studying galaxy collisions:
http://burro.cwru.edu/JavaLab/GalCrashWeb/ (http://burro.cwru.edu/JavaLab/GalCrashWeb/)
These galactic collisions are beautiful, like some cosmic kinetic sculpture, but they sure don't show evidence of having been designed:
Galaxy Merger (http://www.youtube.com/watch?v=FsevCRK75u88#ws)
Multiple-Galaxy Collision Simulation (http://www.youtube.com/watch?v=wyS1eHXe75U#)
Milky Way and Andromeda Galaxy collision simulation (http://www.youtube.com/watch?v=dJRc37D2ZZY#)
Galaxy Merger Simulation - Gas View [720p] (http://www.youtube.com/watch?v=ws2V-Sv8-GQ#)
Andromeda / Milky Way galaxy collision (http://www.youtube.com/watch?v=6It9bUMcP3E#)
Galaxy Merger - Active Galactic Nucleus Fueling (http://www.youtube.com/watch?v=Z8CRDDt1RJw#)
Galaxy Merger Simulation - Stellar View [720p] (http://www.youtube.com/watch?v=_FlGiqPdbx8#)