If the report holds true, it’s easy to see why Kevin Feige would be excited about the potential for more options to play with.
Feige has also expressed an interest in “more interesting, unexpected combinations of characters,” and I can’t think of an easier way to do that than to have access to the Fox properties.
All these comments tie together pretty nicely, but again, there’s no indication that the Fox and Disney deal will definitely be going through at this point.
Feige has already said that “anything is possible” with Phase Four, and while it would be a stretch to guess he meant a Disney and Fox merger at that point, the quote fits.