Currently, there are no dedicated Marvel comic con events. Disney does have any information on if there are future plans to hold conventions dedicated to their Marvel brand. However, Marvel will make appearances at pretty much all the major comic cons like SDCC, NYCC, etc.
Upcoming Marvel Conventions & Events
Chicago, IL 60616 United States + Google Map
San Diego, CA 92101 United States + Google Map
Anaheim, CA 92802 United States + Google Map