DC universes collide in epic final ‘Justice League: Crisis’ fan trailer; ComicBookResources.com, 12/18/15

Kevin Melrose, ComicBookResources.com; DC universes collide in epic final ‘Justice League: Crisis’ fan trailer:

"UltraSargent has debuted what’s described as the “final trailer” in the series that began in October, and it’s by far the longest and most ambitious yet. Using footage from DC Comics live-action adaptations dating back to Christopher Reeve-era Superman, the four-and-half-minute trailer offers a new take on Crisis on Infinite Earth, with Grant Gustin’s Flash at its center... As it stands, thought, Crisis draws from wide array of sources, from 1989’s Batman and 1990’s The Flash to Smallville and Supergirl. NBC’s short-lived Constantine even shows up."