sorry to bust your bubble but they won't. It's a partnership with Toyota and it's their design with Subaru engineering.
Subaru simply made it better thanks to the boxer engine and suspension design.

We should see our first BRZ to view here in Tally in 2 weeks after it leaves orlando area.
It's a sweet ass ride.

By the way, it's a 12.5 compression direct injection engone so i doubt a turbo will ever get added.