I like it too, and as some of y'all have said - the pickup is not in the Stingray single humbucker position.
I think it will sound good (hard to imagine any Spector sounding otherwise) but I am skeptical as to how much of the Stingray tone it will emulate due to the pickup being so tight against the bridge. It's like when people buy Laklands expecting to be able to get a Stingray tone by soloing the bridge humbucker, but it doesn't sound like a stingray because the pickup is too close to the bridge to cop that tone.
The electronics, and even the pickup (I've heard the EMG Hz MM before and it's a nice sounding pickup) combined with the TP will sound good, but I don't think it will get the Stingray tone simply because the pickup just is not in the sweet spot at all.
The sweet spot is exactly what the name implies: it's where the harmonic content of the stings and the reproduction of those tones by the pickup are maximized in their response, largely determined by the pickup position. I think that this Rebop MM will sound good, but its going to be heavy on the high-end and the high mids and not as much content in the low mids and low end. The tone that is so well-enabled on on Stingrays (or even the Modulus Funk Unlimited/Flea Bass, or other MM style basses) is primarily due to the traditional location of the single pickup. Without the one on the Rebop being in the sweet spot, I am skeptical about how much low end is going to naturally come from it's location. For those of you with Spectors that have humbuckers, solo the bridge pickup and you'll be able to tell immediately that you don't get the Stingray tone - not even an approximation. Granted that with this Rebop, these are different pickups, different electronics, different woods, etc., and no, I don't think Spector is trying to make it's own Stingray, but I also don't think it's going to get as close to the tone that a Stingray-placed pickup bass will produce. I do think that it will sound nice and tight and very cutting, and on a fretless, it will sound absolutely insane. But I don't think it will be close to a Stingray tone because the pickup simply isn't in the right place in between the bridge and nut.
But I think it will provide a very immediate attack and will be punchy and cutting as all hell, but the low end won't be there in the way it is on a traditionally placed Stingray pickup location without some heavy eq'ing. But I'm excited for them to come out like everyone else and I will very much look forward to getting to try one out. We may very well be able to dial in enough eq to compensate for the location of the pickup, but it's definitely not going to be as close to a Ray tone as people are hoping.
Again, please don't kill me - it's just my opinion, and an opinion on a bass that hasn't been released yet to boot (but hopefully they'll have one at NAMM this month to try out and we'll hear more from people who get to try it out if Spector is there) but the secret to Stingray tone starts with that pickup being in just the right location, and it's very obvious that the Rebop isn't putting their pickup there. You can't get around physics, you know?
But the possibilities are endless for this bass in terms of modding to get closer to achieving that MM tone. Putting in an active EMG (especially their Alnico version of it rather than ceramic), or even venturing out to genuine Stingray pickup remakes like Nordstrand, Seymour Duncan or even Bartolini, combined with some of the purposefully-designed MM preamps by folks like Nordstrand (who just came out with a pre-amp that exactly models pre Ernie Ball Stingray pre-amps) stand to get it a lot closer.
I have been fantasizing ever since I got into Spectors about owning a MM Spector (a custom USA in particular) so I'm stoked than there will be one that won't require a second mortgage. I just wish they had placed the pickup closer to the Stingray position.
But like some of you said, it is a Spector - not a Stingray. So it's going to have it's own thing no matter what, and I don't doubt that it will be a righteous addition to the Spector tone line up and I too can't wait to be able to try one out and see what can be done with it.
And they certainly picked one hell of a gorgeous sample model to put out there for initial promotional materials. That is a stunning bass, and that almost "vintage-tint" neck color offsets the black inlays amazingly. And the satin quilt on the body is to die for. It reminds me of John's satin green NS5, which is one of the most beautiful basses I've ever seen.
So again, please don't kill me - it's just my opinion, and like the rest of you, we're sharing opinions on something none of us have tried so who knows how close to an MM tone it will get? But I do wish they had moved it forward - even just a 1/3 of an inch would make a huge difference.
It hasn't been put on the market yet so you never know! It honestly wouldn't surprise me. It is Spector we're talking about. They always make things better and better! 
