https://www.cnbc.com/2018/06/26/foxfeared-comcast-came-with-more-regulatory-baggage-than-disney.html

21st Century Fox saw Disney as a safer regulatory bet than Comcast when deciding on competing bids, a Monday filing with the U.S. Securities and Exchange Commission reveals.

The registration document states that “while a potential Disney transaction was likely to receive required regulatory approvals and ultimately be consummated, a strategic transaction with Comcast continued to carry higher regulatory risk leading to the possibility of significant delay in the receipt of merger consideration as well as the risk of an inability to consummate the transactions.”