PC Gamer apparently got a sneak peek at the updates coming for Team Fortress 2. Not too long ago, Valve teased the community with a somewhat cryptic message, saying that a 'large scale modification' was planned for the game.
According to the article, this large scale modification includes unlockable weapons for each class, which will be selectable from a load out screen. These changes will be rolled out to the Medic class first. The first weapon described is a new medi-gun that will permanently boost your teammates' health to 200% their normal values (instead of the temporary 150% boost that the current medi-gun supplies). There are no details yet on the second weapon, but it will be another medi-gun that will alter the class in a different way. It sounds like the first gun will be unlockable by acquiring half of the 35 new achievements coming for the Medic class, while the second update will be unlocked after acquiring them all. It should be interesting to see how this new feature pans out.
Another announcement is the new game type being planned, in which the attacking team will have to accompany a mine cart from one end of a map to the other. The article linked above goes into more depth about this game type, and it sounds super fun. In short, I can't wait for these updates!