This is where the fans have to put a foot down. Draw a line in the sand. Do not buy Zeus. Show them that we as a community will pay our good money when we get characters we've asked for.
First of all if the offer is for every country I won't be buying Zeus as I'll get him free with God of War: A. Second of all even if I didn't/don't get him free I'll buy him because he looks fun and last of all you are not everyone. While you might not like Zeus personally I do. Besides gameplay > characters in my opinion.