I think everything that anet said is a joke. We waiting for 8 months but we only got some verbal updates officially.Honestly i am not believe in anet is still working on this system atm.Btw the 6th year anniversary video makes me feel more disappointed and confused about the alliance system,because they repeated a critical point few times, "they gonna release some functions which planned for 3rd expansion."So i confirmed and believe that anet has suspended their works on new expansion, i think they had seen the end-game of gw2 and trying to stop spending more effort on it.I think the alliance system would be a new content in the new expansion and they will have some beta test through the 3rd expansion.But now everything is gone, i think the WvW system of gw2 is a reference for them for developing the next generation of gw series.I believe that they would give us a primary picture of the alliance or beta test in gw2, but the core system or content would not be given in gw2.