The phrase "ragtag rivals" means a group of competitors or opponents who are disorganized, mismatched, or come from diverse backgrounds. Full definition
Marvel's «Guardians of the Galaxy» finds space adventurer Peter Quill the object of a bounty hunt after stealing an orb coveted by a treacherous villain, but when Quill discovers the power it holds, he must find a way to rally the quartet of ragtag rivals hot on his trail to save the universe. (mediamikes.com)
Who: Chris Pratt, Zoe Saldana, Dave Bautista, Bradley Cooper and Vin Diesel What: When space adventurer Peter Quill steals an orb coveted by a treacherous villain, he must find a way to rally a quartet of ragtag rivals to save the universe. (blog.bullz-eye.com)
But when Peter discovers the true power of the orb and the menace it poses to the cosmos, he must do his best to rally his ragtag rivals for a last, desperate stand — with the galaxy's fate in the balance. (metacritic.com)