Nope. If there's one thing that should be absolutely clear, it's that in our interpretation there is literally no way in hell to beat the Shivans militarily.
Solving the puzzle that is the Shivans will not be done through a well-placed Helios in some exhaust pipe.
Face it, HM, we have our storyline pretty much mapped out, and there is literally nothing that we'd want to add to it. If we wanted, we could keep this going forever, but we feel that it's better to have a set goal that we can work towards, as it allows us to do some dramatic pacing work that otherwise would not be possible.
I will not discount the possibility of later additions to the BP universe, but the story Darius and the rest of the team wants to tell can and will be told in the three chapters we said we would do.