Flash and Arrow Crossover Episode Teaser

Well there's a teaser for the April 16th episode of Arrow entitled "The Man Under the Hood" and what's special about this episode is that it crossover with The Flash series that's yet to premiere. The problem is that there's no Flash to this teaser... but Deathstroke is awesome! The episode is written by Geoff Johns, Andrew Kreisberg and Greg Berlanti who are the three men behind The Flash pilot episode. Though it's not really a pilot since they picked it up for a season, but whatever. So why did I post this if it has nothing to do with Flash? Well to give you the info on who wrote it and... Deathstroke. Next season when he's off the show... it's really going to suck. https://www.youtube.com/watch?v=XPjWcoOqwVc