This aircraft isn't going anywhere any time soon. Not this year, maybe even not next.
I hope not for Boeing's sake.
On the other hand a long grounding and loss of confidence @ la DC10 might have a financial impact but is not necessarily synomym to commercial failure.
A bit of historical backround for the young generation here :
The (extremely bad) publicity around the DC10 at the time did not prevent Douglas to sell 432 of them , while the technically superior L-1011 only sold 250 and pushed Lockheed out of the civil airliner market for good.