Henry, interesting thought. I don't see the F2 as being a completely different camera than the F, but it is more of a departure from the F than the F was from the SP. They both use the same shutter (just with a faster top speed on the F2, afforded by the titanium parts in the mirror box) and the same focusing screens, etc. The DP-1 finder is basically the F2 version of the FTn finder, with the same sensitivity and meter cells, etc. The rest of the F2 seems more mainstream than the F with its rangefinder-esque quirks. Like the hinged back, the shutter release being where it is on a Nikkormat EL, etc... For the most part, I can go back and forth between my F2A and my F, and not get confused. They both work pretty much identically.
The F3 was more of a departure than the F2 was from the F, but, at the same time, it still used the same shutter - this time, electronically controlled between 30 seconds and 1/1000, and, basically the same focusing screens, just in a frame with a lip to allow easier removal and installation. So, even though the F3 is much different, it's still not a completely different camera from its predecessor. It wasn't until the F4 came out that you could say that the evolution stopped and revolution occured instead. Even so, it still used the same basic focusing screens, as well as the same LCD that the F3 had in the upper left corner.
With respect to Nikon doing a commemorative edition of the F, I think we would've seen it by now. So, I doubt they'll do it. If they did, I suspect the going price would be somewhere around the D3x. Luckily, the selection of nice F's is pretty good, so, I don't think I'd miss having a collectible version.