If the decision had been made to scrap it, I'd expect the engines and other high value LRUs would already be removed.
Without knowing the extent of the (non-structural) fire damage to the interior, I'd think the easiest repair would be to simply replace the aft fuselage tail section. The 787 fuselage is manufactured as sections - nose, a few constant diameter pieces, and tail - based on the pieces I see sitting around at Boeing waiting for final assembly, the tail section would have most if not all of the structural damage.
A bigger issue might the interior - I suspect most of the interior suffered smoke damage and would need to be replaced (that smell simply does not go away).
It's also possible that if the air safety investigation is still open, it may be quarantined in case the authorities want to do further inspections.