Decades upon decades of Marvel storytelling will be condensed into six issues this summer.
One of the things that separates Marvel and DC Comics is that Marvel holds together better in the long run when it comes to narrative coherence. DC reboots itself every now and then so they can start over and act like all the continuity before it no longer matters...until they start doing a big story about how everything matters. Marvel isn’t completely innocent when it comes to this, but their examples are stuff like “changing reality so Spider-Man isn’t married” or “changing reality so that the Morales family always existed in the main books.”
In other words, the Marvel stories from the '60s are still canon to what’s going on today, only we’re supposed to imagine certain aspects differently due to the idea that all those events