Gerrard will not die. It has been stated in Phyrexia.
Urza will
, but so will Yawgz. Serra will come back.
This is what I WISH would happen:
Odessey
setting: all over the multiverse
Urza dies, and Serra takes him to some kind of Sanctuary on a new plane.
She somehow revives him, but Urza is no longer a 'walker.
Meanwhile, as Yawgz dies, He has managed to steal the Spark. he gives it to an inner sphere memeber, Karavak.
Karavak leaves, with a handful of Phyrexians.
They go find a new plane, and do.
Karavak then wonders what to do with the spark.
He decides to put the spark in a Phyrexian, then graft Greven's spine onto them.
He does it, but the Planeswalking Phyrexian, Azru, is too strong to be controlled, and kills all of the Phyrexians, except karavak, who escapes with Yawgmoth's eye.
He finds a band of Goblins who help him, and he teaches them of the Great god Yawgmoth and they worship the eye, and he manipulates them to be his slaves.
Meanwhile, Azru goes loking for urza, and kills a whole bunch of Angels. Gerrard and Urza, basically an old man now, escape with Serra.
Odessey because of all the traveling
Haven't thought of Judgement yet.