The marvel logo goes in front of Fox movies too anyway. All the R rated ones would have to do it leave out the Disney logo. Or have Feige oversee Touchstones MCU movies as if Marvel studios was making them. Disney allows Netflix to make The Punisher i dont think they would say no the R rated movies as long as it doesnt risk the brand. An R rated Spiderman movies can mess with the Brand but Wolverine isnt targeted at small children anyway.