I think Trek on tv is done. People don't watch tv the way they did even 10 years ago.
In my opinion, the only way to do a new series would be on a web network, available on demand, by subscription. But that would require a massive guaranteed viewer base, and the chances of generating enough revenue to make it profitable are slim and none.
To be honest, I tend to think that after this round of movies is completed Trek will have pretty much run its course.
"Are you out of your Vulcan mind?"