Anaconda are a group of large snakes found in South America. Moreover, Anaconda is a movie that Jennifer Lopez wants to be forgotten. Microsoft could have chosen this name, Anaconda, as the name for their dev kit for the next generation of Xbox.

Jez Corden has expanded the rumour:

According to previous rumors, next Xbox is codenamed Scarlett and could have been designed under Zen 2 and new AMD GPU architecture.

Thanks, Gamingbolt.