X-Men: Apocalypse Official Trailer Breakdown - 36 Things You Need To See
26. Apocalypse's Plan
"Together we will cleanse the Earth, for the strongest." So that's Apocalypse's plan (shocking) - the kill just about everyone, leaving only mutants (although given the classing of mutants, that'll likely cause friction). This awesome shot of the assembled horsemen likely comes at the start of the final push, meaning Cairo is the city that we'll see ravaged in the finale.