Well, i understand that a new expansion is the only bone you can throw an endgame player is a new expansion, but it is starting to get a little crazy. It's a big money maker for companies like Blizzard, but it also makes much of the old content obsolete. What happened to Blackwing Lair? Molten Core? Onyxia? All gone. What will happen with Black Temple and Kara, as well as any other endgame raid instance? Gone as soon as WotLK comes. Why? Because, Utgarde Keep, the preliminary Northrend instance is going to have much easier to gain loot that will be comparable to or better than current endgame gear. It happened to the original raid instances, and it will happen to these too. If, for example, a new system was brought in, it may work a little better while not obsoleting the old content. This was a system put forward by an old guild of mine. Having a 1st degree Level 70 character would be all of the current stuff. Another patch could bring in 2nd degree, adding a new rank to a few abilities, and adding a 2nd degree regular and heroic difficulty to instances, offering stronger enemies, better loot, and maybe special parts and/or bosses to the instance reachable only if you are a second degree level 70 character. This system would take quite a bit of time, and would mean longer patch download times, but that is the price of improvement.