After paying close attention to the complete press presentation, I have come to some neat conclusions that seem to make a lot of sense.
First off, the jump button is indeed A (X, A, or

.
Second, the attacks are as follows.... X (Square, B, or Y)are the first, B (Circle, C*, or A) and the tertiary are Y (Triangle, Z*, or X)*
Third, and most odd, the swaplanders' tertiary abilities will be something that has to do with their legs...so that any swaplander with those legs can pull off that move...*(at least I think)
*I am not sure about this.....
The controls are as follows....Xbox button (Ps3, Wii, and 3ds)
Though I haven't played skylanders on a wii so idk about the attack buttons....