It is a good indication that supporters are very angry at prices and this will just be the start of taking more action
Liverpool do not play at home again until February 25 when they host Augsburg in the Europa League last-32 second leg tie.
But they have two high-profile home games against City and Chelsea in March.
McKenna added: "We have got Manchester City and Chelsea at Anfield so those two league matches - where prices are still going to be on the forefront of people's minds - will be opportunities where we will discuss what action we take next.