The DeLorean manufacturing has been in the works for at least 8-10 years. I certainly hope that they choose an engine with more grunt than the volvo mill they had originally.
I find it hard to believe that more than a handful of folks are going to pay a ~$100k for a DeLorean without some significant updates
88 is kind of a stretch for the original power plant.
I'm guessing since so many people convert the original to a small block Chevy, that the new ones will probably follow suit.