I have two suggestions:
1. Something that plays off of the conspiracy theories that Rangers fans have come up with over the years. I was thinking an avatar with the conspiracy Keanu meme that has a jersey and/or a rangers hat on Keanu: Top caption: "What if the refs" Bottom caption: "are Pens fans." Or we could have a picture of Jesse Ventura with a jersey or something photoshopped on him and have the title "Conspiracy Theories with the New York Rangers."
2. This suggestion involves the usual complaining of recent "asset mismanagements (Halpern, Kundratek, PAP)" and how it seems how they play great whenever they face the Rangers. I think it should be based off of what Canucks fans have with X player is the next X legend. For example, there is a picture of Jeff Halpern with the caption: "We let go Jeff Halpern." The next picture could be a picture of John Madden and the next caption would be "We'll play John Madden."