I'm really curious as to how this relationship between Subaru and Toyota will play out. Obviously tons of rumors are flying, and nobody knows what will come of it.
My hope is a hacked Subaru floorpan that I can easily swap the driveline to AWD. I did on my '93. I cross my fingers for the new car. Custom driveshafts don't scare me. Missing captive nuts don't either, but mean a ridiculous amount of work that isn't worth the money for a new shell as a hobbyist.
Staying RWD wouldn't be the end of the world either, if they made the rear wheel-wells large enough.