It's possible, though it reminds me of my WoW days. Weeks before a patch, "leaked" (usually a synonym for "rumored" or "totally fabricated") content would be out. There'd be screenshots of the stats of new gear and supposed facts about where it came from and such, which was rarely true. Usually it was just somebody playing a prank or blowing out of proportion some tiny bit of truth until it became something appealing.
Sorry, I don't mean to discredit what you're showing us, heh. Now with that disclaimer out of the way, time for some theorycrafting. The fragmented sticky idea would be a neat one, I'd say. Or at least one worth trying. It would all depend on how it plays, how much damage a fragment does, how far apart the fragments typically land, etc. As for a demo shotgun, that would really change how the demo plays, regardless of which weapon slot it took over. I'd think it would have to be different from the soldier/engi shotties just so that demo didn't have some sort of straight up direct damage abilities, the biggest check on demoman's power. Like, low rate of fire/low ammo, but explosive rounds (minor to moderate splash damage, little to no direct damage). That seems more fitting to demo's style. As for the beer mug, who knows what that could be.
