She has no power, nothing. At the end of Planeshift, Karn has the book that controls the portal that leads to Phyrexia and reads it. He says that he knows how to save the world. And that is where it ends, with a big cliffhanger. Multani is still helping out too, actually quite a lot.
Apocalypse is the last one, the absolute last one.
THis has been said by Wizards for a while. Not the last expansion, but the last one in this storyline. The crew of Weatherlight die,except for maybe squee cause hes the coolest char. THEN Teferi comes back in, and it starts from new with Teferi leading the way into the next storyline. Don't go off topic, make your subject line precise and informative.