Right off the bat, I disagree that Uldren dying is a must. Half the problems the story writers encounter stem from losing villans. I mean, we're just cycling through Hive. The Son. Then the Father. What next? Oh yeah, the sister. Sigh.
I'm not against Uldren dying per se, but I'd be perfectly fine with him surviving to pester us another day. I mean, no matter how many times Batman beats the Joker, 9 times out of 10, the next time there is a Joker storyline it's better than anything the rest of the Rogue's gallery has to offer.
I'm not saying Uldren is the Joker, but he IS "hot" right now. At least ride his infamy out for awhile.