It’s a fascinating time for sure.
So far, Comcast seems to be positioning themselves well when it comes to theme parks. Having the foresight to continue funding (for now at least) EU construction with money that has to be coming from the core business (not to mention working better for their employees across the board IMO), they stand a good chance on becoming true equals with Disney. I'm expecting them to come out of this with far more land on I-Drive/Uni Boulevard at the very least, and possibly with SeaWorld at the very most.
I think Disney will be relatively fine in the long run...but it's going to hurt for a while.