"Spielberg and Lucas take a giant steaming dump on their own legacy" booms the voiceover - before warning us that the film contains "not one, but three scenes with gophers" and is "so disappointing, its best moments are the references to the previous movies".
It doesn't, indeed, pull any bad-sound-effect punches.
And if, after being reminded of such a bad film, you'd like to cleanse your palate with something a little more appetising - why not click through our slideshow of trailers for comedies coming our way in 2013?
The Incredible Burt Wonderstone
Steve Carell and Steve Buschemi are camp, ageing magicians up against the new and exciting, ponytailed Jim Carrey. What's not to love?!
A Liar's Autobiography
It's not a documentary. It's not a Monty Python film. It's... The untrue story of the very, very wonderful Graham Chapman.
This Is 40
Judd Apatow's hotly-anticipated new comedy about life as a 40-something couple, starring Leslie Mann, Paul Rudd and Jason Segel.
In which Melissa McCarthy steals Jason Bateman's identity... and really, really doesn't want to give it back.
I Give It A Year
Bridesmaids' Rose Byrne (complete with British accent) leads a great cast in the new Working Title romcom written and directed by 'Borat' creator Dan Mazer.
Stand Up Guys
In which con men Al Pacino and Christopher Walken (we love this already) have to get the old gang back together for one last time...
Tina Fey is an admissions officer, Paul Rudd is a single dad. Love and laughs are clearly in the air in this comedy from the director of 'About A Boy'.
Love Is All You Need
A sentimental Danish comedy starring Pierce Brosnan? We're sold!
The Guilt Trip
Seth Rogen is Barbra Streisand's son. Together, they have to travel 3,000 miles across America. What could possibly go wrong?
The Big Wedding
Yes, it's a wedding romcom with Katherine Heigel. But it stars Robert De Niro, Diane Keaton, Susan Sarandon and Robin Williams - which surely mitigates it.
Robot And Frank
'Frank' is an aging jewel thief played by Frank Langella. 'Robot' is the caretaker robot who looks after him. Together, they could plan the perfect crime...
Police officer Melissa McCarthy is teamed with FBI agent Sandra Bullock... with hilarious consequences.
Anchorman: The Legend Continues
San Diego's top-rated news anchor is back! And this time, he's rumoured to be paired with Kristen Wiig. We quite literally can't wait.
(Via Tastefully Offensive)