IMO, a factory Wrangler would be the best, but I'll take an AEV conversion over nothing.
As has been mentioned many times, now the 3.0 passes all the emissions testing, there is nothing stopping Jeep putting it in the Wrangler. It's simply a choice at this point.
They're putting it in the GC, which shows they are not against the idea, which is great.
2008 Jeep Grand Cherokee CRD QT2
GDE ECO Tune 241hp/440torque
I can think of two factors that have changed drastically since 2007/8, which might help the decision:
1. Gas is much more expensive than it used to be, so efficiency is a big deal nowadays. (and it's not going to get cheaper)
Think about how prominent gas consumption figures are in advertising now, even for the Wrangler.
2. CAFE standards are getting stricter and stricter on efficiency.
I'm picturing a turbo or SC for the Pentastar --- maybe not in the JK from the factory, but in other vehicles. That will get retrofitted into JKs.
AEV will offer the diesel.
I'm just guessing but it seems like how they do things.
They're whipping up a nice 2.4L Multi-air turbo too. Who knows what will become of that...
With it being the only "true" SUV left on the road thanks to the Explorer going "crossover", it will continue to do well.... until gas prices go up, again. My buddy was hired in last month in Toledo so Jeep could keep up with demand. Honestly, the only thing that may be it going diesel, but a small one at that.