Ok, so let's make the thread. What do you think? Here are some of my thoughts.
My first thought on this is that Hasbro wouldn't make such a big deal about this, and be all secretive until Toyfair if is wasn't a biggie. By biggie, I mean a top tier "want' by fans, and not size wise.
Next, it has to be something in the 83-86 range. Why? Well after 86 has some really great vehicles, but nothing that fans are really screaming for before a lot of other stuff. Also, 82 is pretty much done. I would love a Cobra Missile Command, HAL, MMS or JUMP, but 3 are not big enough to warrant this kind of announcement and the other is a cool playset, but I don't think Hasbro wants to offer us a cardboard playset and make a big deal of that. Everything else 82 has been (re)made. That leaves 83-86 to draw upon.
So trying to think like a fan and Hasbro at the same time, makes my head hurt. HOWEVER, if I were to pick a top three for possibilities I would go with:
MAULER
MORAY
TOMAHAWK.
I agree with your deductive reasoning/process of elimination.
The Mauler was close to being recreated by the club had the turret mold allegedly not been damaged, which means assuming Hasbro didn't dump the rest of the molds needed to make that tank, the turret could be remolded to complete the tank. I believe last year's Hasbro panel featured the Mauler being re-released as part of their "What could have been" slides.
The Moray was re-released both by the Club and at retail within the past 10 years, so although a cool vehicle and potentially accessible, I don't think it has quite the amount of fan enthusiasm behind it to warrant a high-profile re-release.
Besides the (2-seater) Skystriker, the Tomahawk is the one vehicle that seems to be at the top of most fanboys' lists for re-release. Back in the day, although the vehicle was large, Hasbro managed to fit it into a pretty compact box, like they did recently with the Skystriker. If Hasbro wanted to make a splash at Toy Fair, this is the vehicle that I feel would garner the most media/fan attention. Reissuing it with sliding or removable side panels and enhanced side guns with gunners' chairs (ala Clone Wars) would be phenomenal.
Blitzkrieg