All has been mostly quiet around Dragon’s Dogma since the game’s expansion, Dark Arisen, released in April 2013. However, it appears that in early December, Capcom filed a trademark for “Dragon’s Dogma Online” suggesting that they may have further plans for the franchise.
Whether these plans revolve around releasing a sequel, an MMO or a mix of the two is currently unknown, as this could also just be Capcom covering their bases for whatever they may plan to do in the future. Is there much of a demand for a sequel? I never finished the game myself but understand it has quite a following.