Go download Cut Him Up while it's free. And the Bruce Lee fighting game is fantastic and worth a look.
If you trust Pocketgamer's rumour mine, they reckon Capcom vs Marvel 3 is coming to iDevices soon. Could be possible given the success of SFIV. From Pocketgamer:
Well, if you are going to start quoting the Rumor Miner, might as well mention his claim that the new Mortal Kombat is also coming to the iDevices. But yeah, I agree with Eduku. Until we start seeing some confirmation for at least some of his stories: Ugh, Rumor Miner.
no, they're not - all you have to do is practice enough. I, for one, am pulling off some insane combo moves and beating them to the ground. Give it some time - it's a helluva great app