For the next one (assuming DOA6 didn't kill the series) hope they pull a NRS and have the main story but also arcade endings similar to 3 and 4. Think it'll be a good way to flesh out the characters like in the older games while also having the big cinematic one.
But like, that requires effort and budget so I doubt it'll go down like that lmao
The series is still alive with Xtreme Venus Vacation. That being said, however, it certainly did quite a number on the fighting portion of the series, and will probably take a LONG time to get a DOA7 out.