Is this zoom then deep stall scenario within the capabilities of accurate modeling in a simulator?
Unfortunately no. The airframe makers do not test into the region that AF447 apparently found itself, and thus do not collect data for this region of "flight". Any such simulator runs would be purely speculative.
Such testing is inherently dangerous and real flight data sufficient for a simulator is unlikely to be available even for a stray event. Best hope is that Airbus collects data in a wind tunnel and compares it with CFD models (CFD=Computational Fluid Dynamics) to see if the results are rational.