Not to burst any bubbles but most of these suggestions are not very realistic...
X2. We as modifiers, are not the majority. You have to consider what the majority would want. Hemi won't happen due to emissions regulations based on fleet size, and you know the GC won't be losing its hemi, or any of chryslers "muscle cars". Diesel might happen, not sure how emissions compares on a diesel. While front and rear D44s sounds reasonable enough, the majority wouldn't pay extra for it, and the rubicon already has this, so people have options. As for a D60 factory option, I have complained about this myself. They have Rams pushing big axles already, they know how to make them. So there must not be a large enough market to justify retooling the factory to make ones for the JK. A substantial factory lift? No way. Safety concerns pertaining to CoG and rollovers would keep that from happening. Roll cage reinforcing would be nice, but the vast majority wouldn't be willing to pay for it. LED headlights is tangible, since its all the rage now, for modders and soccer moms alike.
While most of the suggestions thus far would be AWESOME, you have to consider the average owner, that will probably keep it stock, or maybe add a BB and some wheels at most. That's who pays chryslers bills, not us, so they are the ones more likely to be heard. You'll see a "soccer ball storage area" before you ever see the hemi and D60 options, unfortunately.