I was thinking about how much I loved the open belly Tauntaun as a kid, I wonder if you shouldn't make a new one.
Now would be a good time to mix a Tauntaun in with your Saga line, you have a few non-AOTC figures coming out soon, why not diversify the product offerings even more? I presume the Reek is a launch for other beasts to come, can the arena beasts find room on the shelves for a gentle furry lizard? I realize that the Saga beasts are electronic, while I'm not a big fan of it myself I guess I wouldn't mind it if my Tauntaun had to make those funny "noggy noggy" sounds, not to mention the sound it makes when it dies.
I don't think the beast would have to be incredibly articulated, but I think the rear legs should allow for some range in displaying him. The Han and Luke versions both offer a single pose, I'd like this new one to have an "either or" possibility. And don't even think of molding on a saddle!
A new pack in would be nice, but who should it be? I wouldn't mind a rebel soldier of no one in particular. Well, the Han Solo version from a few years back seemed to be hard to find, he could work. Of course he would need a lightsaber this time (metal hilt would be cool) and obviously he needs articulation to ride the beast. But let's go a step further than the last one, how about added leg articulation that let's him stand straight? Ball and socket if you have to. The knees should be a given, I'd like him to kneel down while gutting the creature. But like I said, no pressure on the Hoth Han, a rebel soldier would do just fine.
Don't worry about including a jar of gooey innards (ala Jabba Glob), I can leave that to my imagination.