You would need to get to MCO by 9 am unless you are not checking any luggage and you have TSA precheck or CLEAR. MCO luggage drop off can be an hour with the Disney crowd having to check baggage. The old days of Disney guests not standing in line with the now defunk Resort Airline luggage service is over. Next security lines are slow with parents wrangling crying kids leaving the House of Mouse plus the the constant stoppages as people trying to bring liquids thru. MCO is easily the slowest airport to catch a plane.
You would also need private transportation. In Feb, Carnival buses did not arrive from Port Canaveral until after 9 am.