The biggest differences I'm seeing in these screencaps [and again, screencaps can't tell the whole story] is in shadows and highlights. Look at the shots of fire, and the fireball in the Flying Wing fight. Where the BD looked blown out, you see detail and better definition. It looks darker, but...
Paramount and Disney have a "friendly" relationship that dates back to the co-production days of Popeye and Dragonslayer, so anything's possible. Others to add to your list of movie trades or licences include the Terminator Franchise and the Mad Max series.