Hmmm? Ive seen many say this is the 1st time one of the Big6 purchased another Big6?
Not many players left. You have AT&T, Comcast, Charter (now Spectrum) and the Mouse.
Comcast and Disney face more scrutiny because the own OTA outlets in many markets and the FCC can step in - RSN's by comparison are not fully regulated by the FCC. They must follow guidelines but they do not need FCC approval to go on the air.
NESN is being wooed by both ESPN and Comcast and the Red Sox/Bruins are evaluating their options. NESN is probably worth 2 billion now as Comcast would love to enjoy a RSN monopoly in most of New England but Disney also sees NESN as being a perfect fit in their buying the FOX RSN's.
NESN and MSG Network are unique that stayed independent and the only other RSN that I can think of is Altitude in Colorado. NESN stands alone as a full 12 month service with baseball and hockey, MSG which really was the first RSN exists mainly because of the Knicks and Rangers and they keep the Islanders and Devils afloat.
Nobody has a clue on what the Red Sox are thinking.