It is possible to gain access to the Zul Gurub area in eastern Stranglethorn Vale. This is an unfinished instance that is not very far from Kurzens Compound and is surrounded by very high level mobs with an instance sitting just behind a locked gate.
To gain access you need to run up to the gate where the instance is found. This is not an easy task and you will probably die several time trying. Each time you die, however, resurrect your body as far as you can past where you died. Eventually you will make it to the gate that you can't get through (at least not while you are alive). It is important to die as close to the gate as possible because you can pass through the gate in spirit form.
Once you are inside the gate resurrect yourself and you can walk freely through the Zul Gurub area without being bothered by any mobs. I literally spent over an hour looking at everything. This is an easy way to explore an upcoming (unreleased and unfinished) instance.
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There is an easyer way into the Zul'Gurub aeres. At the border between Duskwood and Strangletorn vale just head into the mountains on the right side of the road facing duskwood. After riding through the mountains there are sevral places where you can gain access to to Zul'gurub