If you're scheduled to land at MCO at 2, and you're taking ME, I'd say that it's going to be tight to be in a park and ready for a 5:15 reservation.
I normally figure 1.5-2hrs between landing and getting in your room. Then you have another 30-45 minutes of travel time on top of that to get to the park, and then another 10-15 minute walk just to get to Akershus. Using the higher end estimates, this puts you there right around 5pm, just in time to check in, but you will have been going and going since you landed, and if the flight is delayed by just a little, it's going to miss.
Since Akershus is a CC-held reservation, if you miss it, you're going to be charged. With that in mind, I'd at least try and push it back by at least an hour (6:30+) or try for a different day.