Maybe all of Game of Thrones is a shadow war between Varys and Littlefinger -

 

"Consider: Littlefinger and Varys are obvious narrative parallels. They're both lowborn men who've risen by dint of sheer cunning and intellect. They've both mainly exercised power from the shadows, backing various noble families with their seemingly significant financial assets and intelligence networks."

read the analysis by Zack Beauchamp > 
Maybe all of Game of Thrones is a shadow war between Varys and Littlefinger - Vox