So who / what company owns the little nugget of land adjacent to the south stand car park entrance?
Buy that and there is plenty of area to rotate the ground through 45 or 90 degrees, and leave space for parking and fan zones.
I'd also suggest that the club don't own Pittodrie Street outside the ground as shown here, although they could include a proposal to stop it up and/or have it pass under/through a stand.
Clearly then though, you lose the money made from selling the land that would in part pay for the construction of the new stadium.