There have not been a whole lot of instances, but early indications suggest there could be more selling after the open. Below is a list of all the instances.
November 2009 was the only instance that put in much of a gain. And even that one failed to fill it gap at any point during the day. None of the others even bounced back as much as 0.6% on an intraday basis. If the market does open as weak as it appears it may at this point, then chances of a strong upside reversal don't appear very good.