As I've mentioned before, Buick will be unveiling it's 'performance' series of cars at the New York Auto Show in April.
The badge being applied to these is 'Super'. This will show up first on the LaCrosse and Lucerne and mark the first V-8 in the LaCrosse and a performance suspension, etc. on the Lucerne.
As you can see here, they will also sport bigger, Enclave-like grill work that, in at least the LaCrosse's case - will be standard across the line.
It will be interesting to see if these actually help Buick sales while we wait for true re-designed models in the vein of the Enclave's style.