Well its like in the post Spider-man One More Day stuff where everybody forgets his identity, but through a specific way of revealing it, their memory returns.

Im not going to do it that way the entire time, and i'm not going to meta or godmod anything. Are you saying that all the powers I gave Sentry/Void are fine and dandy, making nearly omnipotent and unbeatable, but 24 hours worth of Sentry only memories is where you draw the line?

It would only affect those Sentry interacts with, nothing more.

Example: Tony and Sentry have coffee together at Starbucks, the next day Tony will only remember having coffee by himself

Absorbing Man and Sentry get into a scuffle, the next day everyone will think Absorbing Man just threw a tantrum. Its no big deal.