Wow the fighting system has improved dramatically.
You have lots of things you can try out in battle now.
Teleporting for example, you can do various of attacks involving teleporting, you can hit and and side/back teleport like in BT1 but now you can also ping pong your opponent back and forth, you can also do chase attacks involving teleporting, and my favorite, you can hit a few stun combos and send the opponent flying up, teleport after him and hit him down.
You can chain combos in Sparking mode and reach even 99 hit combo like seen in some videos!
You have violent rush which is awesome, you charge at your opponent, send him flying and chase him down and hit square rapidly.
You can now charge your melee attacks at will, hitting a powerfull blow when ever you want, you have the stun combos which involve the triangle button too.
Basically you have to play it to see how many things there are that you can have fun with, not to mention the Ultimates and Specials have been improved too! real-time chargeable moves are awesome, huge improvment over BT1. =)
Well I finally unlocked Bojack, Cooler, Tao Pai-Pai, Metal Cooler, Cyborg Frieza and Coolers henchman Sauza or something.