Nothing happens to The Thing 616,all his actions did in giving the cure to his former self was to create a divergent timeline while leaving his own unchanged.
There was a sequel to this in MTIO #100. Ben goes back to the other timeline to see what happened to that Ben Grim. He was cured but soon after Galactus came to his earth.There was no Silver surfer and thus Alicia didn't convince the herald to rebel. Galactus consumed the biosphere and no the people lived on a dead world Kamandi style. Oh' The Red Skull is trying to take over what's left...