[Update: We have another Transformers 3 TV Spot and Poster!]

With the exception of artsy efforts like Tree of Life, summer movie fare is generally all about the fast-paced action and dazzling (or disappointing) effects. Hence why the latest TV spots for Green Lantern, Transformers: Dark of the Moon, and Conan the Barbarian display all the glorious fight scenes and CGI spectacle they can in less than sixty seconds.

Green Lantern hits theaters this Friday, followed by Transformers 3 in two weeks time. Conan the Barbarian doesn’t arrive on the scene until August, but sometimes titles released during late summer can prove to be among the more memorable of the season (ex. Inglourious Basterds).

Warner Bros. is about to see whether or not its exhausting marketing campaign (and financial investment) for Martin Campbell’s Green Lantern movie will pay off this weekend. The most recent TV spots and featurette certainly contained their fair share of polished effects, dazzling sci-fi visuals, and scenes of Ryan Reynolds looking more and more convincing as the heroic Hal Jordan.

However, as we know all too well, great marketing material does not guarantee a great final product. All the same, between early positive buzz and the release of a promising eight minutes of footage, it seems like Green Lantern will at least not be the bomb that certain people have long been anticipating.

The latest Green Lantern TV spots also serve the film well, featuring more positive critical praise, a few additional impressive bits of Jordan’s Lantern Ring powers in action – and a better look at the corrupted scientist Hector Hammond, whom Peter Sarsgaard seems to be having a ball bringing to life.

Check out the latest (last?) Green Lantern TV spots below:

Transformers: Dark of the Moon

The third and reportedly final entry in director Michael Bay’s Transformers trilogy will arrive in a matter of weeks – and so far, things are looking pretty good. An early review pegs it as being the best entry in the series (for what that’s worth), and we’re not alone in our assertion that Dark of the Moon looks to offer the most incredible 3D experience since Avatar. Finally, the destruction-heavy footage glimpsed so far looks as polished and awe-inspiring as one could hope for in a summer blockbuster.

Stellar CGI was never the issue for this franchise – though the same cannot be said for coherent action sequences. It all but goes without saying that the segments in Transformers 3 that focus on human “drama” will once again be the least interesting in the film, despite some top-notch additions to the human cast in the form of stars like Frances McDormand and Alan Tudyk. However, a new TV spot for the film still showcases some of the “humor” that polarized viewers over the previous installments.

With all that said: the third Transformers movie looks to be the most visually-spectacular alien invasion action-fest to hit theaters this year (see the second TV spot below for further proof of that). So take that in consideration when you decide whether or not you’re actually willing to shell out top dollar to see this thing.

BONUS: Check out a new poster of Optimus Prime ready for a serious throwdown, courtesy of Fandango!

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Conan the Barbarian

In general, feelings towards Marcus Nispel’s Conan the Barbarian reboot really do appear to be quite mixed. On one side, there are fans who like the film’s grimly dark production design and are looking forward to two fun hours full of bloody violence, fantastical monsters, and star Jason Momoa stabbing just about everything in sight. On the other side of the debate are those who say that Conan looks like a mindless B-movie with cheesy one-liners and gruesome action – just not one that seems like a lot of fun.

The second Conan TV spot isn’t likely to change any minds either way, since it once again features footage of Momoa battling an array of armored warriors, giant CGI tentacled beasts, blade-slinging sand monsters, flaming-haired sorceresses, and Stephen Lang as a despicable warlord whose face looks like it lost a battle with a cheese slicer.

Conan the Barbarian certainly has promise, what with the ancient world of Hyboria looking stylishly savage – not to mention, Lang and Rose McGowan seem to be having a ball playing crazed villains. So we’ll have to wait and see if the movie turns out to be good dumb fun – or just dumb.

Check out the second Conan the Barbarian TV spot below:

Green Lantern hits theaters this week on June 17th, 2011.

Transformers: Dark of the Moon will arrive in theaters two weeks from today on June 29th.

Conan the Barbarian is set to arrive later this summer on August 19th.