Yes, we went to see this in the cinema. In our defence, my partner knows one of the actors in it (King Arthur, of all people) and that was the real reason we decided to go. I can honestly say that, outside of his scenes, nothing about this movie was worth watching. Which isn't to say that he was a stand-out, but more that in the midst of dozens of jumbled storylines and patched together set pieces, watching a giant, robot, alien dragon tear apart some Medieval knights was actually kind of cool. Merlin was awful, but otherwise the "Dark Ages" scenes were quite fun, in a Michael Bay-ish manner.
Back to the 'present' day and The Last Knight is yet further proof that the franchise died long ago and any further sequels are merely the equivalent of gas passing from the lungs of the already rotting corpse. The last film, which introduced the Dinobots, was so forgettable I forgot I'd watched it. Twice! To it's (partial) credit, The Last Knight at least manages to create a plotline so poor that it will likely stick around in my memory. (Edit: It's 2020, I'm moving the review as part of a CMS migration. I cannot recall anything beyond the King Arthur parts. Guess that's a nope, then.)
The plot feels like a rough draft of a Dan Brown book which, having long since been discarded by its author, was discovered in a Hollywood trash can and somehow ended up on an executive producers desk. Once there, in an attempt to ensure someone would watch it, the Transformers were bolted on. But which Transformers? Well, franchise staples Bumblebee and Optimus Prime are back, though the latter is relegated to a bit role, spending more time as a narrator and transforming a total of once, off-screen. For the villains, we get Megatron and assorted Decepticons we've never heard of, have zero characterisation and designs straight from a rejected 90's "x-treme" comic book tie-in. There are no character arcs for any of the Transformers (unless you count inexplicable dino-babies) except for Prime, whose own purpose can be summed up as ripping off The Winter Soldier, but doing so having only read the DVD blurb and watching a single trailer. His 'brain washing' and betrayal, followed by a subsequent return to character, really only serve to ensure he isn't around for years, in which his fellow Autobots are all-but hunted to extinction. Of course, Megatron is still on Earth, but doesn't bother using this time to consolidate any of his own power. Indeed, for the great villain of the franchise, Megatron seems utterly useless; Bumblebee (whose origins are retconned yet again to include serving in WWII) is clearly the most powerful Transformer at this point. Every other Transformer has it's head cut off and is dead, but 'Bee just flies back together like some robotic Jedi.
If the story is a mess, the dialogue is almost unbelievable. There are some good actors here, but they have been given nothing to work with. There are lines which make no sense, character revelations which are so forced they feel scripted, and pieces of dialogue that feel leftover from previous iterations of the plot. Characters explain some actions which have already been explained by other plotlines, creating confusing paradox-like moments, whilst major plot twists aren't covered at all. Most characters are entirely superfluous as well. Mark Wahlberg returns as the sole protector of the entire race of Transformers, for reasons that are never really explained, but which lead him to the exact position to receive some magical pendant and become the titular "Last Knight". Except the pendant serves no purpose except to make a magic sword appear to save Optimus Prime from would-be executioners whose presence or actions are never explained. The sword then disappears and is never mentioned again. I think it's meant to be Excalibur, but honestly I have no idea. Joining him are comedy black man (good but played zero role), impoverished orphan child (good but utterly pointless and clearly used because Wahlberg's on-screen daughter refused to return for another film), and discount Angelina Jolie (not great despite being the only character with a legitimate reason for being involved). Oh and for reason probably only known to himself and the debt collectors, Anthony freaking Hopkins. I have no idea why an actor of this calibre would agree to do a Transformers film, but even he couldn't save the script. His presence did allow us Cogman, the only Transformer with any character (even if it was one which wildly swung between extremes) but beyond that his role was a walking excuse to advance the plot.
Really, there is nothing much to say that is positive about the film. The explosions were big (often far too big to make sense), the CGI was acceptable (but never great) and the pacing existed. I spent more time laughing behind my hand at the serious moments then at any of the (many, many) "jokes". All-in-all, just don't bother. Unfortunately, based on the final scene (and box office takings), it looks like The Last Knight will not be the last Transformers film. I think, though, it may be the last one I watch.