please do not try to act like you know what your on about... about 60% of that is dealt with in the over all map anyway, namely texture, shading, the modeling is usually made using generic structures with some special models used for significant details, land marks etc. And that a lot less than 70%, fundamentally, you have the model for that area, with textures, (mostly already used in the area), lighting which is usually the engine rather than the level, and is just a question of getting the engine to generate shadow, the only thing that isn't in the rest of the area is the layout of the locked area, and the spawn information there in, the area's mobs are those from elsewhere as well, so that doesn't come under anything new either, i suspect they will be replaced, and it is likely only a fragment of the new area TBH, your looking at less than 70%, maybe 50%, and even then you have scripting, which is the majority of the game, granted a lot will be handled by the engine, but then you have various other things not present, spawns, items, new mechanisms, modifications to mechanisms, texture, other pre-existing features, the base layout they have in place, the maps set up. not to mention sound, cut scenes, dialog, event handling, events. a small map area is a very very small part of the expansion you will find, If you think there is more in it then that, find me proof of that and by all means i will take you seriously