Compared to what id consider mass market cars, i.e..Camry ~340K/yr, etc. I actually didn't think they sold that many Wranglers, thx. Thinking the FJ Cruiser would probably be a better example for comparison, but I don't have much experience w/ those and we are starting to look for a Wrangler for the Offspring so I've looked at a lot of them as of late.
Yes Wranglers do have a great resale value, I am not sure why it is so good, and I say that as a fan, past and probably future owner.
I expect the Defender will have a better than average resale value based on niche and numbers. The rest of LR's line are very nice, especially the RR's, but not especially distinctive...nor are most other cars out there. Yet certain non exotic cars, Wrangler, S2000 and FJ are three off the top of my head and I am sure there are others, do seem to have flatter depreciation curves. I think the Def could be in that category; it is different, a 'lifestyle' brand (hate the term but appreciate the marketing and branding behind it) capable and useable. Time will tell.
All that said, of the SUV's I've looked at recently, it made me grin the most.