1) Remember, no resort-to-resort buses.
2) So, even if on-time, you plant to take a taxi to WCC, that takes about 15-minutes
3) A bus ride could take up to 1-1½ hours.
4) Best route choices.
. . . bus to MK/TTC, bus to WL
. . . bus to MK/TTC, boat to WL
NOTE: My personal guess is that your timing will be close.
. . . 11:40 - arrive MCO
. . . 12:00 - deplane, if sitting in rear of plane
. . . 12:10 - walk to tram
. . . 12:25 - walk to DME booth
. . . 12:35 - wait in line to be assigned a bus
. . . 12:45 - walk to bus **
. . . xx:xx - wait time for next bus unknown
. . . 12:55 - wait for bus to load
. . . 1:40 - get to hotel
. . . 1:55 - check in
. . . 2:10 - place carry-on in room
. . . 2:15 - walk to bus
. . . 2:25 - wait for next bus **
. . . 2:45 - bus to MK
. . . 2:50 - walk to WL boat
. . . 3:05 - wait for next boat **
. . . 3:20 - arrive WL
. . . 3:35 - walk to WCC
** Could be done quicker by a few minutes.
NOTE: On such a busy day, do not expect any "Grace Period" for being late. We had several people come up to our Concierge Desk last year (on both Thanksgiving and on Christmas) complaining of missing their ADR and having it cancelled, and getting the $10 Per Person No-Show Fee. We told them they should have been on-time. Some gave excuses, and we said, they should have planned to be on-time. They responded with "what about a Grace Period?". We told them there is no Grace Period at any eatery. The eatery, AS A CONVENIENCE, might let them in, but not guaranteed.