I have to admit, the 4 vs 4 battle sounds like a neat idea. I have my doubts about how well it'll work. But still an interesting idea.
And the co-operative idea sounds interesting. So I think this game will be one to watch just to see how it turns out. And if it turns out to be a good game, might be worth picking up.
1.The major one being no local multiplayer which is completely dumb.
2.No GT characters, I guess the tenkaichi series spoiled me with the abundance of characters but lately I have been missing the GT characters like SSJ4 Goku and Super 17.
3.The Co Op gameplay just does not look all that interesting.
As I said before, tenkaichi had the right idea with the gameplay and the sheer amount of characters it featured, why they decided to abandoned what Tenkachi brought to the table it beyond me, but since tenkaichi 3 none of the titles have had the quality or quantity of features that tenkaichi had which is a shame.