The Team Fortress 2 blog has details on a new Smissmas update that's live in the teamplay shooter. This includes "stocking stuffers," new "festive" weapons, new cosmetic items, as well as an all new beta gameplay mode. Word is: "We've also made a change to MvM loot drops. Specifically, in addition to the usual Botkiller drops, there's now a chance to get Australium weapons (including the incredibly rare Golden Frying Pan) to all advanced and expert MvM tours. The tours affected by this loot drop change are Steel Trap, Mecha Engine and Gear Grinder." A separate update has details on the new beta Mannpower Mode, and Valve hedges their bets by stressing how this is still in beta. This sounds a lot like QUAKE CTF, as it entails grappling hooks and powerups. Here's a bit on what it involves from the FAQ:

What's Mannpower Mode?
It's an in-beta CTF-like game mode with grappling hooks and nine different types of powerups. (A lot of this will change during this mode's development. We'll be tweaking rules and adding/subtracting powerups as we go.) It's currently playable in modified versions of Ctf_foundry and Ctf_gorge.

Mannpower alters a few game rules. For one, random critical hits have been disabled. Additionally, teams won't be able to capture the enemy flag unless your flag is at your base. (When your flag is away from your base, you can touch it to instantly return it to base.)

What was that part about grappling hooks?
Right, that! There's a grappling hook available to all classes in Mannpower Mode. You can equip it in your action slot and use it by switching to slot 6. Press fire to shoot out a hook. As soon as it hits something, it’ll start to reel you in. Release the fire button when you want to detach.