No they are completely different companies. And goals in general.
Most people don't seem to understand that Sony isn't just a gaming console maker. They have their hands in EVERYTHING, movies, music, house items, TV's, stereos, headphones, games, consoles, phones, etc, etc ,etc ,etc.
Them partnering up with Microsoft wouldn't make ANY sense as a company.
Meanwhile Microsoft has there hands in a few things that they are primary for, Computers, Phones, Consoles, etc. Them teaming up with sony wouldn't make any sense either.
Plus the SCOPE at which both companies work at is extremely different. Ingeneral, no They will never team up to make a single console.