I mentioned under the "repacking toys" thread that I had no issue--thankfully, the other two HISSes were still there. The lady at the counter even remembered the dude who brought it back. I hope this prevents him from returning further toys.
Looks like, as best I can tell, the guy got it for the ceremonial Cobra staff, which is packed with the cannons, and left those and the chassis out to fit it back in the box. (Even without the chassis and weapons, I had a hard time getting the other pieces back in.)
Wolf HoundSnow CAT looks to be mostly the same as the original, with a remodeled launcher. I've read it's all new, though, and, if so, they did a fine job of replicating the old one. It even has the Snow CAT logo on it, which looks nothing like a wolf, hound, or wolfhound.