http://screenrant.com/stephen-amell-iron-fist-arrow/

Arrow star Stephen Amell says he isn’t too troubled about the comparisons to Marvel and Netflix’s upcoming Iron Fist series.

why should he care? the Green Arrow has been around for over 65 years and his show has been on for a pretty successful run - I have no idea who this Iron Fist guy is but even if they copy the look nd feel of Arrow it isn't going to detract from the source.