Marvel released a teaser image that only asks "Is He...?" with "Be Viligant" listed at the bottom.
Along with the image included:
The Marvel Universe is on the brink of a major change. Find out more, September 18th!
September 18th hits in two weeks, but we could speculate and try to finish the sentence.
Some sort of reference to Marvelman that everyone has been waiting for?
He a reference to Him which is a reference to Adam Warlock?