I am looking forward to see the reason for their rivalry, though I have to admit the rivalry cutscenes are very disappointing. I was expecting some clever reasons for pitting the all-stars against each other, but Sweet Tooth fighting Kratos just because he dropped his ice cream is honestly not what I hoped for. Thus, I am not expecting any complex motive for the rivalry between Evil Cole and Fat Princess. Those are just my two cents, though.
Sweet Tooth would pick a fight with Jesus if he looked at him funny...
LOL! Well, I have never played Twisted Metal, so I do not possess deep knowledge on Sweet Tooth's personality, but to me, it seemed like a weak reason for a rivalry.
I also saw Ratchet & Clank and Jak & Daxter's rivalry cutscene and was not impressed either. I did, however, like Drake and Sly's.