I watched the older animated one (Invasion) a few months ago, and my experience tracks with you. Brain bug is taking over a Federation ship and trying to crash into Earth for conquest purposes (sort of an Alen: Resurrection thing going on there). It’s up to Rico, Carmen, and (maybe) Carl to stop the ship before it arrives. It’s 90 minutes of mid-2010s videogame cutscene, and is a fun bit of frivolous nothing, if that’s what you want.

The latter animated movie (Traitor of Mars) brings back Casper van Dien (and Dina Meyer, which is interesting depending on if this is a sequel or a prequel), but I’ve not seen that one yet.