'Flash vs Arrow' CW Battle Starring Grant Gustin & Stephen Amell December 2nd, Watch Teaser Video Here (VIDEO)

The superhero battle between the Flash (Grant Gustin) & Arrow (Stephen Amell) is taking place on the CW on Tuesday night. Captain Cold and Heat Wave will also make an appearance in the episode. You can check out the trailer teaser for the episode above. 

Part one of the crossover, The Flash episode "Flash vs. Arrow," will debut on The CW tomorrow night at 8 p.m. ET/PT. The second part, Arrow's "The Brave and the Bold," will air Wednesday night at 8 p.m. ET/PT.

"The Flash" series premiered on the CW Tuesday night (Oct 7) and the ratings were a huge success. The series debuted to 4.5 million total viewers and a 1.8 demo rating, marking the network's most watched and highest rated series launch since "The Vampire Diaries" back in 2009.

Leading cast star Grant Gustin tweeted his reaction to the news: "I can't thank you enough to everyone that tuned in. I don't really understand the number system but apparently we did very well. I love Barry, I love this show and I love everyone I have the pleasure of working with. So id love to keep making this show 4 u."

He followed up with, "And don't forget!! #ArrowSeason3 premieres tonight! There will be a quick cameo by yours truly.. Not to mention it's just bad ass."

Exec producer Andrew Kreisburg also took to twitter to add, "Thanks to everyone who watched #TheFlash last night. Now watch the truly unforgettable season premiere of #Arrow tonight. Barry MAY run by."

Who do you think will get the best of each other between The Flash and Arrow?