i know this has been done plenty of times but i wanna see the difference it would make if (and answer each scenario please)
Scenario one: Doomsday is at the level of his first appearance (when he fought supes). Hulk see's doomsday kill betty and pretty much everyone he loves, so he loses his shit and goes worldbreaker. (at least as powerful when he blew up a planet with red she hulk, but probably more because he just saw his loved ones murdered by him, keep that in mind). his morals are off and the slug it out until one dies or K/O's. (also don't say doomsday would win because he would come back, if he dies or get's K/Oed, hulk wins)
Scenario two: War hulk vs current doomsday. (war hulk is the one which went against juggs and beat him.) http://media.comicvine.com/uploads/1/11315/728144-hulk457_juggernaut_super.jpg he broke juggs helmet i think.
Scenario three: Hulk is a mixture of devil hulk and guilt hulk, which would make him utterly evil and WAY more powerful than worldbreaker hulk. at least 150 times more powerful, against current doomsday
Scenario four: same as number 3 except doomsday is at his power level on his first appearance.