Yeah, actually. He intuitively knew he was lying to Hulk, even if he couldn't consciously admit it to himself, when he said "nothing bad would happen." It wasn't really fair of him to ask Hulk in the first place, because there was no way Hulk could understand the implications of the question.
So yeah, that was pretty bastardly of Sentry.
Too many people hate or completely loathe Sentry... and without any sort of good reason. I think he's a fairly good character. I mean, his suit is neat (doesn't look bad or anything), he has an interesting background, and even though he is extremely powerful, he is written and portrayed in such a way that, (from the Sentry's own point of view), allows him to still feel vulnerable/powerless; which makes for a good character.
Hmmm, i personally don think that the void is stronger in the negative zone. The void did explain that if Sentry struggles, the Void gains strength. In the Neg zone, Sentry lost it like hell in a way. The Void dominated. Void breaking Hulk's bones was an eye opener. Hulk fearing void? Does that seem like the Hulk?
Sentry is still an unstable character, now he unstabalize marvel U in a way. Hulk still remembers Sentry? Hulk sees Sentry and Lindy as dad and mum? Did Sentry existed b4 Banner's gamma boom or is it just after? If he did, why did Sentry did not stop Hulk's rampagings in the past?