1)Alter reality by punching in the Fortress.
Didn't a far less powerful Indestructible Hulk do something similar to this when he punched against time, and rewrote certain aspects of his past?
2)Escape from being drained of Gamma Radiation for 4 years, and get out of the Speed Force
There is no reason why he wouldn't resist from being drained. After all Arm'Cheddon tried to do this. Furthermore, the Hulk get's his power from the Gamma Force, so how would draining him cut off the source of his power?
3)Escape from the Phantom zone by punching
This is another unquantifiable feat. A weaker Hulk was also able to punch through a dimension. Didn't Betty tear through a dimensional wall herself before ever coming into contact with the Wishing Well?
4)Tank the explosion of Luthor's machine which merges all the earths into one.
Why not? He was able to survive the blast that indirectly destroyed more than a planet.
5)Go through a 300 mile wall of willpower
At the level that he was on, I don't see how this wall would stop him.
6)Kill 32 (cannon fodder) Green Lanterns
Again at the level that he was on, these guys would be far below him, and I don't see how they wouldn't be turned to dust like the Herald's that were turned to dust in the Dark Dimension.
7)Defeat Sodom Yat with Ion entity
Why not? What did Yat do that placed him on WB Hulk's level?
8)Tank anti-matter energy from the Anti Monitor and defeat him.
How powerful were the blasts of anti matter?
I don't see any reason why WB Hulk could not complete these trials.