The champion rework polls held by Riot recently have awarded Skarner with a rework, by fan vote. However, Shyvana has been a strong contender for that rework for years now, and she is the most likely next champion on the rework list.
Shyvana is a creature with pure elemental magic blazing in her heart. Though she most often appears humanoid, she can take her true form when necessary, that of a fearsome dragon, incinerating her foes with fiery breath.
Having saved the life of the crown prince Jarvan IV, Shyvana now serves uneasily in his royal guard, struggling to find acceptance among the suspicious people of Demacia. This is the basic story of the champion, in more ways than one.
Riot have been eyeing Shyvana with the intention of a rework for years now, with no real opportunity presenting itself for that rework to actually take place. The latest voting poll just showed that, had Skarner not been an option, it would've been Shyvana to be awarded the rework.
One of the developers has commented that, while Riot can’t promise that Shyvana will be the next big VGU they do, she is a pretty strong contender for the next one they explore outside of a VGU vote, as they did with Dr. Mundo.
As shown by Shyvana's story, it is the most generic fantasy storyline ever, and not even a developed one. AS for her gameplay, while it can be fun to play, as a literal dragon, Shyvana does not feel as dangerous on the Rift as she could be. There is potential in the champion, just waiting to be explored.