Hold your horses, Merida isn't a princess yet.

Mulan would definitely win, she ended up being more determined, skilled and better trained than all of the guys from the army and she defeated the main villian twice. Also Merida, because she is a terrific archer and really can do it well. I';m not sure if Pocahontas is the most fast runner in the world.

@starlight77 sure she isnt but theres no harm in adding her to thing until we know for sure if they will include her or not in the line up.

Oh! I forget Pocahontas is also skilled at canoeing!

Well why don't we just wait to add her until she's official then? It just annoys me that people are including her already and we don't even know yet.

Mulan = Yes
Merida = Yes
Ariel = As a mermaid, it's natural. As a human, we can obviously tell she can't swim. So no.
Pocahontas = Maybe

Ariel in mermaid form wouldn't be allowed to compete.

I'd pick Merida if she were officially added, but not yet. Her skill with a bow is superhuman.

I don't think Mulan's fighting skills are exceptional...maybe above average, but not Olympic level.

It's entirely unclear how fast Pocahontas is at running compared to others, but she does show excellent form in diving.

As a mermaid. That would be cheating, but whatever :D

Ehhh! How about rapunzel?! Did anyone forget her creepy strength? If there was any sort of climbing event she would win!

^
You can always add her to the list.

Did you see the trailer when Merida shot her arrow, as it unbelievably took out the line of another arrow??!! SUPERHUMAN ALERT!!!

Ariel said in her song that with legs she counldn't go far. (that kinda rhymed!!!)

Mulan is pretty good but martial arts is common for a lot of people. I mean, did you see yesterdays footage for Missy Franklin?! These people try for more than ten years to even be qualified that they'll be in the olympics. And...
Bruce Lee's way of fighting is so olympic...that it's so fast people record it and edit them into slow motion...

Pocahontas would qualify for the high dive, I mean ...dude she jumps out of waterfalls. She would qualify...
BUT she's probably too good for the olympics :P But there are many faster runners in track then her I bet.