For me it has to be 2-Door. I wanted a NEW-old-style Jimmy, No luck from GM... Same for Blazer... Same for 2 door Cherokee... I love the new Bronco and there is not a single vehicle to compete with it. Not even the Wrangler IMO.
I'm not saying they could not offer A soft top. Only that they probably could not offer one that behaves like the 4 door one... That would cause hissy fits. Time will tell.
My guess, which should be confirmed after the vehicle release, is that the 4 door soft top has capabilities that could not be reproduced on the 2 door by ford due to the restricted space between the roll cage and the back window line. the 4 door longer cargo space gave Ford more room to shape...
During the pre-reveal teasers, it looked to me that the Bronco grille letters were lit. Alas, it was just a lighting trick. I would definitely have lit letters (soft). If they use 256 color LED the color of the Bronco could change with your intended use! 4 Low, RED!