Kiss Kiss Bang Bang was a good movie. The Losers was a fun, competently made actioner that ultimately failed to adequately distinguish itself. Box office success can be elusive, and a movie that doesnt make money can still be a springboard/showcase for talented artists.
JC was a bad movie, with bland lead performances, terrible pacing issues, and derivative characters and story. The best parts of that movie, the actual "good" stuff, has been done before, and much better. It deserved to bomb. Obviously you disagree, but this is the consensus.
Perhaps some day, far into the future, certain aspects of JC will be used as inspiration for future films. I have no idea why, given that the best parts werent particulary original in the first place, but its certainly possible. But that day isnt today, or next month, or next year. And thank god, because theres nothing from JC that I want to see in a Marvel/GotG movie, including the director/actors/art/story/costumes. (That said, I am a huge fan of Stanton's Pixar work. Unfortunately, he's no Brad Bird)
If the folks involved in GotG want to take inspiration from Burroughs work, thats great. Plenty of comic writers "borrowed" stuff from Burroughs and Robert Howard and other adventure writers, but theres no upside to mining the corpse of JC while the stench still remains.
On topic: The casting for this movie is rumored to begin next week, so the lobbying for Patton/Dawson/??? begins now.