How can you even retrofit 4 seats on the 89 Batmobile without changing the original specs? Anyway, if he does do it, I hope there's an option for a 2 seat only conversion.
You don't retrofit it - it's a completely new design in that it has to be wider and longer than the 89 batmobile. I image it may share some visual similarities, but the reality is that we won't know exactly what this vehicle looks like until the movie is out. For all we know, this thing may look like a completely new entity.
I'm not really a flash fan, but when they announced they were pulling Keaton and the 89 goodies back into the mix, I became a fan of the movie.
Plus, chicks still dig the car