@MonkeyBat
If I remember correctly, there is an agreement between AZA and EAZA to each focus on one species of tree kangaroo. As far as I know, Goodfellow is being taken over by EAZA.
@Cyathea Conversely, Matschie's tree kangaroos have almost gone from European zoos. (Incidentally, Goodfellow's tree kangaroos are kept not only in Europe but also at Zoorasia in Japan and the Singapore Zoo and Australian Zoos.)