They all die. The people thinking that they live are the ones that did not read the arc, and surrounding stories of the arc that occurred before or after it. None of them would live through this.
The Wishing Well did not change the way anyone's powers worked during that story. Betty as a Red Hulk has the ability to absorb massive amounts of energy. When Rulk did it to Thor there were no brilliant displays of pretty colors that indicated that was what he was doing. When he beat up Uatu, there were no brilliant displays of pretty colors to indicate that he was leeching power either, and with Betty the same thing was happening. BUT, unlike what happened to her dear old Dad when he fought the Hulk, and Thor, she did not over-extend her powers, thus she did not begin to over-heat like he did. The Wishing Well allowed her to keep pace... KEEP PACE with the Hulk, because he was growing in power to the point that a normal Red Hulk would be unable to keep up without over-heating. Once again the Wishing Well did not change the fundamental way that anyone's powers worked. They kept the same Power Set. Why? Well did anyone see her grow wings? Did anyone see her gain TP, was she able to fly like Superman, or was she still leaping about? Did she grow balls and wiener? Was she able to cast spells, open dimensional portals with her mind, distort reality, turn into a dog?
I hope I made my point.