a series about Riker and the Titan
in a post-Nemesis
setting could be a winner, IMO.
I haven't read the novels but a new series would obviously be able to go any direction it wanted.
Include (without going overboard) a core of familiar characters around Riker and Troi --Worf?, Tuvok?, Ezri? --with a crew of new faces, stories, and plots....it could be successful, both financially and critically.
Going that route would also be an easier sales pitch to the powers-that-be because it would offer a reliable core of cast members that audiences are already familiar with...just a safer bet to take a chance on. Whether or not the actors would be interested or not I have no idea.
But the writing and production would need to be good right out of the gate. People would love to see a good crew on a cool new ship exploring new places and going on new adventures.
I still think there would be a nice TV market for good
Trek. The Riker/Titan angle could be good Trek if they did it intelligently.
my .02 fwiw.