ZZ comes after zeta and technicall three spinoff series (08th team, war inthe pocket and stardust memory) occur between the trilogy and ZETA and the IGLOO ovas come before the trilogy
that said, if you want the "main saga what you have plus ZZ is right.
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http://img.imgcake.com/grouchwardsdvpngyj.png
The grouch and the Zangoose.