Talk:Destroy All Monsters/@comment-4851935-20140721105505/@comment-1030114-20150715235052

Yep.

The Xiliens first appeared in 1965, whereas the Kilaaks first appeared in this film, which was made in 1968.

So yeah, although the Xiliens in Final Wars have a different backstory and design, as far as copyright goes, the Xiliens from 1965 and the ones from 2004 are one and the same.