The full trailer for the CW network two-episode Flash vs Arrow TV crossover has released. 
 
The two night event, which will begin with the December 2 episode of The Flash (see “Flash vs. Arrow' TV Crossover”) sees Oliver Queen and company travel to Central City to help Barry Allen’s Flash battle a metahuman menace. 
 
Arrow, unsurprisingly, actually poses the question at the heart of the episode at 0:28, “Once and for all, who would win, me or you?”