A product comparable to the Behringer Feedback Destroyer digital parametric EQs that lots of people use to EQ their subwoofers would be a nice addition to the Outlaw product line. Something more HT-centric, perhaps with auto-setup.
Really, it'd be nice to have such a feature integrated into the pre/pro, but an external box would be OK. If the 990 had the horsepower to do this, I'd suggest it as a worthwhile upgrade that people might pay for.