My guess is you are thinking about:
this upcoming movie: GREEN LANTERN CORPS (most clues point to this one)
Title: Ah, the old SE puzzlearoo
This is clearly a reference to the "old redditaroo", in which a reddit post contains an ambiguous reference and a comment is made reacting to it as if the reference is pointing in the direction it clearly is not. The comments are archived and daisy-chained together in a seemingly never-ending chain of fun. People often declare "Hold my (whatever), I'm going in!" when reading the chain. https://www.reddit.com/r/switcharoo/
1973 Ford tow truck
This is a reference to the fact that when you visit reddit.com/music, you are redirected to a photo of a 1973 Ford tow truck. You probably meant to visit reddit.com/r/music
Trip to geeks’ country in Portugal
Found on dc site: Several years ago, the terrorist known as Kobra threatened to destroy Portugal's capital city Lisbon with a dangerous hydrocarbon weapon. The Justice League members Aquaman, Batman, and Green Lantern fought against Kobra, and though the villain escaped, they did succeed in saving Portugal.
Why Germany imprisons mother
Doing a reddit search on this brings up several results, one of which references DC universe and Green Lantern Corps specifically: " Ever since the fateful day that Krypton was destroyed, the Green Lantern Corps has been preparing for the day that the legions of Apokolips might attack another inhabited world, and they have reason to believe that day is drawing near. "
John Stewart, according to Wikipedia
John Stewart is one of the Green Lantern characters from DC
I found this referenced by a thread in the texas subreddit: https://www.reddit.com/r/funny/comments/texas/classic/
Still looking for better connections between some of these...