I have the game already and trust me they have skipped a lot of the story.
The good thing is that the story is told in battle so you feel like your actually fighting for a reason.
They also took out the free roaming that was in BT2 which is disappointing.
But they have enhanced the fighting technique quite nicely and every character is more unique so this really is the best Dragon Ball Z game out.
(PS2) Dragon Ball Z Budokai Tenkaichi 2 Dead Goku Password :
tnTB tpbj ?Bl? navs
-O*F *!Jj SN*s Uuds
(DS Friend Code) Final Fantasy III : 137544574557
(DS Friend Code)
Friend Code: 4639 6323 8084