User blog comment:Gemnist/The Benefits of a Marvel Not-Entirely-Cinematic Universe/@comment-1895174-20140125214140

I don't think everything needs to be in one universe. Since the MCU is a franchise driven by live-action material, it has a natural lifespan, and if every property is crammed into it, we'll be looking at nothing but a painful cycle of reboots in another decade or so. If Marvel wants to continue the MCU in comic book form after the movies end, like what's been done with Buffy the Vampire Slayer and Smallville, that'd be alright, but they'd be relatively low-key and the zeitgeist will have moved on to something else. But by working with different universes, they don't have to worry about too much at once. Have the Avengers universe, then when that starts to wind down, launch another; and when that starts to wind down, launch another; and so on and so forth. That way there will be a lot of new material to mine for an Iron Man reboot by the time that comes around. The Iron Man of 2030 may be a different character than the Iron Man of 2014.

Proposed Universes:
 * Avengers Universe - basically what we have now, plus Capt./Ms. Marvel
 * X-Men Universe - self-explanatory
 * New York Universe - the characters announced for the Defenders series, plus Punisher, Moon Knight, and Spider-Man (I'm optimistic Sony will lose that license someday)
 * Fantastic Four Universe - FF, Black Panther, Namor, Silver Surfer, Inhumans
 * Supernatural Universe - Dr. Strange, Blade, Ghost Rider, Hellstrom, Howling Commandos (they can be successfully separated from SHIELD)