And according to those in power there is no "after." This is the new state of things for the foreseeable future. This is only likely to change if there is a significant regime change at Marvel.
Secret Wars will only be lasting 2-3 months. Battleworld is here for the long haul. And no Tribunal, Celestials, Eternity, etc. is just how things will be from now on.
The writing is on the wall.
Marvel has made no secret of their desire to synergise their products, and have started some of that work with the likes of Nick Fury Jnr, the new SHIELD, the new Nova and numerous more cosmetic changes, but in order to complete that plan to the best of their ability that means some major changes, and I dont think its unrealistic to suggest that will happen.
A more streamlined, less convoluted Marvel universe where each of the characters have updated origins and where the heroes and teams look more like their movie counterparts is almost an inevitability at this point.