First off covers can be deceiving and Marvel has severely reduced the impact of this so called return of Banner and Hulk by playing these games with bringing him back then killing him off again. That cover almost reminds me of that issue 425 cover where The Merged Hulk turned into The Savage Banner but I presume this is reverse. Is that Rulk on the cover as well as Chulk?
Are referring to the cover in the article in which Hulk is surrounded by tons of his supporting cast? If so, that is the eBay exclusive variant for Marvel Legacy #1 which doesn't even include the real Hulk in any capacity as far as I could tell.
The only teaser we have for Banner's return is the mouth picture. I will believe it when I see it. Even if he does return, I am positive it will be mishandled by whatever abysmal team Marvel has working on it.