Starship Troopers: Traitor of Mars is a sequel to Invasion which I saw a year and a half ago. Both are animated movies continuing the movie franchise history (though after the original movies all subsequent sequels have been fairly small-scoped).

After Invasion, Colonel Johnny Rico (Casper Van Dien) is stuck training Martian recruits on Mars, recruits who are not really into the Bug War, as pretty much all of Mars is not into supporting the Bug War. So when the Bugs attack Mars they are caught unprepared and the whole planet is quickly overrun except for Rico and his team of recruits.

Meanwhile new Sky Marshal Amy Snapp (Emily Neves) wants to sacrifice Mars by exploding a planet cracker bomb that she had previously installed on Mars, just in case. General Carl Jenkins (Justin Doran) had discovered that the Bug attack is part of Snapp's plan and after he's captured it's up to Rico, his recruits and Captain Carmen Ibanez (Luci Christian) on the John A Warden to save Mars...

Dina Meyer returns as Dizzy Flores, though a sort of hallucination of Rico's. The animation is much better than Invasion and the plot feels a bit more epic than all the films since the original. This is a better movie than I expected.