Well, these synopses for the season two finale of The Flash and the season four finale of Arrow are rather vague! However, they still drop some interesting hints about what we should expect; for example, after having already revealed that he wants to conquer Earth, what could Zoom's "true plan" be? Oh, and I think we're all hoping that the "surprising force" Green Arrow teams up with isn't Felcity, right? Perhaps the episode will mark the return of Black Canary! That's a pretty popular theory...
THE FLASH - "The Race of His Life"
THE FLASH VS. ZOOM – After Zoom (guest star Teddy Sears) reveals his true plan, Barry (Grant Gustin) vows to do whatever it takes to stop him. Antonio Negret directed the episode written by Aaron Helbing & Todd Helbing.
ARROW - "Schism"
OLIVER TEAMS UP WITH A SURPRISING FORCE TO STOP DAMIEN DARHK – Oliver (Stephen Amell) teams up with a surprising force in an attempt to stop Damien Darhk (guest star Neal McDonough) and his magic once and for all. John Behring directed the episode with story by Greg Berlanti and teleplay by Wendy Mericle and Marc Guggenheim.