its not the 998 mule..

overhangs are too long on both the rear and the front, the rear already shows signs of relationship to the panamera and yes the overal wheel length seems bigger than 911 as well...  the rear features are a good 10 inches longer than 911..

If they are testing the 998 already, which is very likely i don't think they'll run around trying to cover the final body design. Early design is done in 997 disguise im sorry...

This has to be a 928 successor to please people hating the Panamera intro.. same platform, same engines... just more space than 911/cayman and less doors than the Panamera ;)