Nods to the previous Joker in MCU thread.
The Joker arrives in the Amazing Spiderman movieverse, lets say at the same time that Rhino is fighting Spiderman at the end of Amazing 2, and begins to start up his stuff.
The Joker has basic knowledge of who Spiderman is and what has happened in the two Amazing movies(lets say he read about it in old newspapers or something).
What happens?