The creators clearly had an option select in place depending on whether or not they were renewed w/ how certain things have been structured.
Renewal would lead to making Infinity War tie in at the end of the season.
Cancellation would lead to them ignoring it.
going into more spoilerific detail
Renewal would lead to making Infinity War tie in at the end of the season.
Cancellation would lead to them ignoring it.
going into more spoilerific detail
The entire season has been set up so that it conceivably take place in a loop where the snap happens. Many characters are entirely absent from the "future flashbacks" all season long and it allowed them to set up a possible IW tie in without actually committing to it until they knew whether or not they were getting renewed.