In a surprising move made only about 60 days before the movie’s originally scheduled release date, Marvel Studios has changed the release date for Avengers: Infinity War (see "First ‘Avengers: Infinity War’ Trailer") to one week earlier than the originally scheduled date:  April 27 instead of May 4.

No reason for the change was given, but it’s worth noting that in its most recent quarterly report, Hasbro noted that in the case of Star Wars at least, it felt that a long window between the release of its movie tie-in toy lines and the release of the movie was harmful to sales (see "Hasbro Reports Challenging Q4").  Plans for Solo: A Star Wars Story are to release the toys the month before the movie.  Avengers: Infinity War merch will release this Saturday, March 3.