The narrative of this film is as follows:

Good guys mess around a bit, then go to another planet to fight something.

It becomes apparent that they are going to fight Broly within 5 seconds of him being on-screen.

Broly looks stern.

Good guys mess around a bit. Broly looks a bit angry.

Good guys mess around a bit, give Broly a weak excuse to use his unsurprisingly mighty powers.

Broly destroys EVERYONE.

Goku wins.

The film is utterly pathetic and only marginally redeemed by some stylish action, which is never varied or interesting enough to make up for an incredibly tedious build-up that lasts a good two thirds of the film. It's a shame, because had attention been devoted at any stage to actually having characters or making the (actually quite promising) story more engaging it could have been pretty entertaining - the fighting is well executed after all, even if it's entirely one sided. Sadly the whole thing is so painfully slow and laughably obvious that it's really not worth it.