Future World does NOT close earlier than World Showcase for an evening EMH. Although the official closing time for FW is normally 7pm the main attractions like Spaceship Earth, Test Track, Soarin', Mission: Space, and a few others always stay open until 9pm. During the eveing EMH they remain open until mignight.
Check out the schedule for EMH on wdwinfo.com or allearsnet.com. Much easier to understand on these sites than the Disney site.
If you want to participate you will need to know which park is opening earlier or closing later for Disney resort guests.
Also note that the evening EMH have been very crowded so grab Fast Passes as soon as it starts because the stand-by lines get very long.