I have not heard of it. There are always rumors of some merger with Dish, etc. but I know of nothing confirmed. T-Mobile does include a Netflix subscription with T-MobileONE service.
Hey there, T-Mobile frontline retail employee here! T-Mobile did acquire Layer3 TV earlier in the year, which is a mobile streaming service. As far as I've heard, we're in the process of rolling that out to customers. Haven't heard of any plans to provide tradition home television or internet services yet, but who knows what lies down the road!
Here's an article about the acquisition of Layer3:
They are offering internet in only a select few places with TV, so don't count on it.