Originally posted by rexpiscator:

...no reward, no useable resources...why bother with the 5th 'Boss'??

test server should come up with a build of the next zone this year, then as usal my guess would be the Yag-Filler items will be changed to something with that you can craft stuff from the new zone. So, can`t hurt to have the stuff already to directly being able to go there instead of needing to take Yag down before.