Nah, it's still going. It keeps selling and it's close to the 3 million mark, which is something that took the best selling game, DMC4, years to achieve. Besides that, people are still regularly playing it, especially on PC, with the amount of aesthetic and gameplay mods that just keep coming.
I'm willing to bet when the sales will come close to a near halt, that's when they'll start thinking about some kind of Special Edition or rerelease to rekindle the fire. Similarly to how they rekindle the fire for the original series when they made DMC4SE, which lead to the making of 5. Capcom be Capcom.