I hope you're right, but IF Yamato does the GBP right, then it will be a huge chunk of plastic and die cast.
IF they do it right, then it better have all the main hatches open, and all removeable missiles/grenades etc.
IF they do it right, it should have removeable engine covers for the booster packs, and perhaps even for the leg or arm armors.
Now, the Die Cast is questionable, more than likely they will use the same die cast pins they use to connect the booster packs in the FP set, and that will be the bulk of the die cast content.
IF all that happens, then I bet it will be pretty spendy. Like I said, I hope you're right, but I will be absolutely floored if it comes in under $100.