It seems like DmC is a rebooted DMC1 and DMC3. Pretty much, So I don't think they will pull a decent story in DmC2, The writing already sucks and that's with their rebooted version of DMC1-3 story in DmC. So what's next? NT will make their own story?
Or it could be a one off? But yes, reboots mean they take the general characters and ideas of the source material and put a new spin on them from a story perspective. I anticipate that if they make another DMC it will be a completely new story.