Arrow : How long could the 4 DC shows last?

How long could the 4 DC shows last?

http://tvseriesfinale.com/tv-show/supergirl-season-two-ratings/
http://tvseriesfinale.com/tv-show/the-flash-season-three-ratings/
http://tvseriesfinale.com/tv-show/arrow-tv-show-cw-season-five-ratings/
http://tvseriesfinale.com/tv-show/dcs-legends-tomorrow-season-two-ratings/

Now that all 4 DC shows on the CW are back after an almost 2 month hiatus, and some of us have seen what their ratings have been like, how long do y'all think they can go based on how things are going for them now? I can see Arrow getting at least one more season, LOT 2-3 more, and Supergirl and the Flash making it to at least 5-6.

Re: How long could the 4 DC shows last?

Supernatural ripped off Constantine so it's a borderline DC show. Use that and Smallville as a basis.

They all strive to deviate from the norm, but collectively swarm to be all the same.

Re: How long could the 4 DC shows last?

Unroll the lead actors want out
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