Checked out 2 DC animated "movies" tonight...and man, what a difference between. I say "movies" because they're actually both web-based 5 minute shorts compiled together into 70 - 90 minute films:
Vixen - I'm not a huge fan of this character, but the BluRay was $10 & this series is actually in continuity with the Arrowverse, so I thought I'd check it out. Eh...it feels like 2 separate animated "seasons" squashed together, and so doesn't really work as a "movie" since the story noticeably climaxes twice: once when Mari comes to terms with her destiny & power and takes on the identity of Vixen, and then again following Mari's battle with the bearer of the Fire Totem (which also plays directly into the events of Legends of Tomorrow Season 3). The story itself just basically explains how Oliver knew Vixen so he could call her in during Season 4 of Arrow.
The animation is passable at best, about on par with a typical episode of JLU. It sounds like the actors for Barry, Oliver, Felicity, Ray Palmer, Cisco, and Vixen reprise their roles from the various Arrowverse shows...for better or worse. Barry & Oliver come off the worst, as Grant Gustin sounds very awkward and Stephen Armell is missing his trademark gruffness. Like the movie overall, though, it's...fine. It's easy to see, though, why this attempted pilot for a Vixen Arrowverse show didn't get picked up for a real series. It's just...fine.
Constantine: City of Demons - Now THIS?! This is more like it. This series only got one season, so taking those micro-episodes & adding another 20 minutes of story just fleshed out what was already there and created a more coherent story. This movie is dark, violent, and gory. It earns its hard R rating without having to work for it like a lot of DC movies do. It also seems to be much better animated than Vixen was, despite probably having a very similar budget.
As for the story, it's typical Constantine: a girl's soul gets stolen by a demon, and Constantine has to find a way to save her while fending off other demons, large & small. The film does a nice job of showing that he's obviously very skilled at what he does, but he's nonetheless always in over his head and barely scraping by. It wraps up in a satisfying and bittersweet way, typical of a Constantine story.
Kind of my only gripe with this film is that I've been wanting a continuation of the Matt Ryan Constantine TV series, and despite him reprising the role here this is definitely NOT in continuity with that show. It's nice to see the mystical side of the DC universe for a change. If you liked that TV series, check it out. Just be warned: it's not for the squeamish.