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"Arrow&amp;#039;s exec producers have suggested that introducing characters from the Batman universe into the show could be difficult. Andrew Kreisberg previously named Nightwing as his &amp;quot;fantasy&amp;quot; character to bring to the screen, but he and colleague Marc Guggnehim told press at Comic Con 2013 that the announcement of an upcoming Batman/Superman movie could make any such crossover impossible.   &amp;quot;We&amp;#039;ve heard the fans and we&amp;#039;re very well aware that they would like to see Nightwing and various other Bat-characters on the show,&amp;quot; said the pair. &amp;quot;[But] that is a little bit out of our control, [and] I think [that movie] announcement made it a lot more out of our control!&amp;quot;  However, the pair reiterated that Dick Grayson&amp;#039;s Nightwing remains the &amp;quot;Holy Grail&amp;quot; for Arrow&amp;#039;s writing team. &amp;quot;We&amp;#039;re like fanboys and it&amp;#039;s wish fulfilment for us every time we put a new DC character on the table,&amp;quot; the duo admitted. Arrow will return to The CW in the US and to Sky1 in the UK later this year. &amp;gt; Arrow star Stephen Amell: &amp;#039;Tommy&amp;#039;s death changes show forever&amp;#039; Watch a trailer for Arrow season two below:      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.digitalspy.com/tv/arrow/news/a501275/arrow-execs-on-batman-cameo-its-out-of-our-control/>