Well, this is, um, inneresting, to say the least.
Christian alleges the pageant girl wrote to him:
"They are now beefing up Oscar's role to be bigger with Harrison injured."
We don't yet know what role the Inside Llewyn Davis star is playing, but it seems pretty obvious he's a good guy, if he is going to be taking Han's place in the Millennium Falcon's pilot seat.
Speculation is that Oscar is actually playing Harrison's son, which would be pretty interesting.
Though sources have maintained that the story will not change "that much," it makes sense that an action scene or two might require Han Duo (oh, come on, like you don't secretly want them to call him that!) to take his father's place.