These ideas' are epic.
I have a small movement+attack suggestion, but i can't remember if this ever happens in DBZ, so i could probably be confusing with another anime/game.
It could be used normally, or as a counter attack, or as a evasion to counter attack move. Probably better as the last kind.
[video=youtube;R1UUdKq9LjU]http://www.youtube.com/watch?v=R1UUdKq9LjU[/video]
Look at the attack from 4:01.
See the way he moves? Basically, in this attack, the character moves fast in that fashion and when he finally reaches the enemy does a attack, either a simple melee, or a combo attack, or a Tier attack, or a attack specially designed for this move, unique to each character probably.
It would cost both KI and Stamina, KI equal to the distance between enemy and your character, and stamina for the attack.
It could be initiated normally by a special button, or to cancel from a recovery to this as a form of counter attack, or when you are being blasted by ki balls, used as a evasive+counter move.
It could also have a special air only version, or if you want more advantages to ground combat, keep it exclusive for ground combat.
Any good? D: