I think the train idea is super smart, business-wise. They can now reasonably cut their cheapest ticket without losing that many sales.
If they get rid of the one park ticket, then would both theme parks effectively become one park?
If so, then "Universal Orlando Resort" would have had 13,718,000 (7,674,000 + 6,044,000) visitors in 2011...
1. Magic Kingdom - 17,142,000
2. Disneyland - 16,140,000
3. Tokyo Disneyland - 13,996,000
4. Universal Orlando Resort - 13,718,000
5. Tokyo DisneySea - 11,930,000
6. Disneyland Park, Paris - 10,990,000
7. Epcot - 10,825,000
8. Disney's Animal Kingdom - 10,825,000
9. Disney's Hollywood Studios - 9,699,000
10. Universal Studios Japan - 8,500,000
...and with the increase in DCA (possibly above Epcot), WDW Parks could end up #1, #8, #9, #10.
Of course, if "TWWOHP-DA" results in the same increase that "TWWOHP" did, then if they counted both parks together, then "Universal Orlando Resort" could be challenging MK/DL for #1 in the world.
People are wary of the "$100 barrier" for a one-day, one-park ticket, but would people be willing to pay "$133" for a one-day one-super-park ticket? In fact, could it be even cheaper, as they would be getting "extra" money from the people who would just be buying a "one-park" ticket, so those who would be buying a "two-park ticket" could get it cheaper than they normally would have to pay.