Join us beginning with the series premiere of "Ultimate Spider-Man" at 11:00 a.m. ET, then stick around for the season premiere of "The Avengers: Earth's Mightiest Heroes!" at 12:00 p.m. ET!
We'll have some special surprise guests for both liveblogs, and this is your chance to interact with the shows' creators themselves! Sign up for both liveblogs directly below, and remember to set your alarm in time to catch the premiere of Marvel Universe on Disney XD this Sunday, beginning at 11:00 a.m. ET!