Realistically, what is the biggest franchise that Microsoft can buy out that would give them first place in console sales?

[Captain_Tom]

Actually it did, it outsold the Gamecube and making xbox at least somewhat relevant. Just like how it contribute in Xbox one outseling the Wii U despite the Wii U being cheaper and having a year head start. Halo did a lot. I wonder what a Minecraft sequal will do.

Yeah but the Gamecube actually profited.  The OG Xbox dug the Xbox division into a 7 billion dollar whole they still haven't dug out of.

So? It still sold more. 

HAHAHAHA!  I'm sorry you just made my night.  The amount of bias it would take to think selling 9% more than the competition make up for losing 7 billion dollars (Instead of profiting like Nintendo did) is just too comical...