With Universal's purchase of an additional 100 acres, they now have enough land for 2 more gates, a new City Walk and more hotels. They will go ahead with this soon, so Disney must act now. Universal is serious about equalling what Disney currently has so the only way to keep it's lead is for Disney to start an all-out war.
Disney should buy Seaworld, build a 5th gate based on villans and add scare zones for Holloween and of course more hotel rooms. They need to do this now and not wait for Universals move. SeaWorld could be used both as an extra thing to do for people visiting WDW and Southern California and while also working as a regional park operator. It would be a win win for Disney and Seaworld.
Disney still has a major lead and can't afford to let Universal continue to gain on them. Taking these steps would not only add gates but go after Universal on their Halloween Horror nights without hurting the current Not so scary Halloween Party. The time is now for the real war to begin.