The thing with Arrow is that similarly to Smallville they CAN leave the DC canon world and strike off in their own direction. In reality they already have: John Diggle isn't Oliver's right hand man, the Undertaking and Moira Queen was never a thing, Thea is out of nowhere and has a relationship with Roy Harper (the real Speedy), Oliver helped create the Huntress (after sleeping with her) and Star City is being called Starling City.
So let's just go ahead and go one further - in the DC universe Dinah Lance is Black Canary, yet the Dinah Lance that is in Arrow is actually Laurel Dinah Lance's mom. And the Black Canary arc is including a third unnamed character... All season 1 I haven't been invested in Laurel's character (I can't say if it is the writing or Katie Cassidy's performance) but with her new sense of purpose she could be written out with a job opportunity in another city, clearing the way for the characters with actual chemistry: Oliver and Felicity.
This is the reason TV shows are 'adapted' from source material... let's see if the WB execs realize the lighting in a bottle they found by accident and run with it.
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So let's just go ahead and go one further - in the DC universe Dinah Lance is Black Canary, yet the Dinah Lance that is in Arrow is actually Laurel Dinah Lance's mom. And the Black Canary arc is including a third unnamed character... All season 1 I haven't been invested in Laurel's character (I can't say if it is the writing or Katie Cassidy's performance) but with her new sense of purpose she could be written out with a job opportunity in another city, clearing the way for the characters with actual chemistry: Oliver and Felicity.
This is the reason TV shows are 'adapted' from source material... let's see if the WB execs realize the lighting in a bottle they found by accident and run with it.