Anyone who knows much about anime knows about Hetalia, this insanely charming series in which countries are person-fied and portrayed with as much stereotype as possible. It's garnered a huge online presence, woth other folks providing Hetalia versions of their own country... or province... or state.
As such, the idea of a Hetalia movie just seems ideal, but this one was essentially just a mash-up of a rather weak storyline involving aliens, coupled with pieces of animation from the old anime series. The latter gave everything a strange, disjointed feel because the extracts really didt go anywhere with the plot of the film (such as that was). And while it was fun seeing countries outside the core group — like Cuba — they were just walk-ons put in, I gather, for fanboy service.
It's a pity because the original series if so wonderfully whack. Instead it got appended to this rather lame storyline.