are you sure about that, i would need confirmation that he said that its not canon.
i have heard before that it was a joke they made, but i don't think he ever stated that it was not canon.
and i have infact read one twitter post on Tommy Andreasen's twitter page, were in he say that under the Forever rock is a passage to one of the sixtheen realms, but he did not say to which one. However in another twitter post he made, he stated that Knighton (Nexo Knight) is not one of the sixtheen realms.
yeah, but again, that does not mean that its not canon. And really, why should one scene be non-canon in an episode?