How about a Crimson Fatalis themed Shyvana skin?
http://vignette4.wikia.nocookie.net/monsterhunterfanon/images/6/68/G_Crimson_Fatalis.jpg/revision/latest?cb=20140830182145
I just love the way they remade the G-rank Crimson Fatalis on Monster Hunter Frontier Online and thought it would make a nice Shyvana skin. I really think this would make a fantastic skin for her. Her human form could possibly resemble the armor you craft for killing this badass Elder Dragon and the dragon form... well.. you see what I'm talking about. :P
Instead of fire particles it could be lava... maybe?
Off topic a bit, I also love the Crimson Fatalis themes used in both MHFO & MH4U.