| This has got to be the worst alternate universe ever. -Spider-Man
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The story is completely contained within issues #678 and 679 of The Amazing Spider-Man.
Part 1: Schrödinger's Catastrophe
The story starts with Peter Parker heading to another day of work at Horizon Labs where he's taking a joint work with fellow Think Tank scientist Grady Scraps to check on Grady's personal project calle "The Break Room of Tomorrow", a dimensional portal through time where the person walks into the following day. Grady test the portal to an skeptical Peter and shows him an edition of The Daily Bugle from Tuesday (being Monday on the actual timeline) highlighting the Symkarian Pride Parade with a picture of NYC Mayor J. Jonah Jameson and Silver Sable.
When Peter tries the Break Room of Tomorrow, he walks into a devastated New York City. Inside he realizes that the room shows how would the future be for the person who walked in if he disappeared for a whole day. Peter grabs a clock from the wreckage stuck in 2:50 p.m. so he heads up back and warns Grady about the situation.
When Grady asks why did that happen, Peter answers that since he makes Spider-Man's tech, he also reports him on this kind of situations and if he doesn't, things like that are bound to happen, so he "recruits" Grady to assist Spider-Man while he tries to fix this future with the help of the "Good Tuesday" Bugle Grady brought.
Peter goes to change into Spider-Man while thinking to warn The Avengers and the Future Foundation but Madame Web appears to him and tells him that he must do this work by himself with no other assistance from the superheroes so Spidey goes in a rampage against the clock to try to avoid the disaster.
With the assistance from Grady, Spidey retakes his steps from the Good Tuesday, from stopping mugger (breaking Daredevil's record in the process) to delivering a child in the middle of the street, but still can't find where will the disaster occur. Meanwhile, at the Symkarian Pride Parade, The Flag-Smasher and members of F.A.C.A.D.E. and U.L.T.I.M.A.T.U.M. are planning a massive assault during the Parade.
With the time running out, Spider-Man is heading into desperation to find out where will the disaster happen.
Part 2: A Date with Predestiny