A to-scale Sailbarge would be my choice.... Ultimately it's on my to-do list anyway, so I'd just as soon Hasbro made it if that were an option.
I too agree with Ewok though, and am under the assumption it's not gonna happen.
It's REALLY not as big as people imagine though... Sizes are all over the board on it in referance material, but the true size (And one in 1:18 scale) wouldn't be unreasonable considering some of the stuff TRU carries.
If it needed mucho assembly (It's gonna be marketed at us, let's face it), then it would really not be that big a shelf item. The interior's mostly air... I'd actually enjoy this vehicle a lot.
My 2nd choice would be a to-scale AT-TE... Much smaller than an AT-AT, and a no frills poseable toy would just be very welcome to me.
While I don't mind the Sith Infiltrator, it's just not a vehicle I'm interested in... Then again, not much from E1 is holding my interest anymore. A Gian Speeder maybe... Only because I could use it for some custom material.
Welp, that's my vote(s).