>>10825945The dynetics proposal was one of the options for the advanced boosters for Block 1A and Block 2.
The contest got called off when Block 1A was replaced by Block 1B, which uses the STS-derived 5-segment solids, and the advanced boosters were no longer needed so soon.
Now it's a bit confusing because you have the Booster Obsolesce and Life Extension (BOLE) program working on replacing the 5-seg SRBs with the OmegA SRBs once they run out of old shuttle casings after 8 SLS flights, but those are considered to be a different thing than the advanced boosters.
I've heard from a reliable source at MSFC that the advanced booster design would be brought into consideration for a Mars campaign with Block 2.