Note: i don't think the Licensing Letter numbers add up. They seem to be leaving a lot out. I referred back to the old "Pokemon is the biggest media franchise" thread and came across references there.
License Global tracked the top 150 worldwide licensors and their total retail sales. License Global notes that "This number is inclusive of licensed products and games across Disney Consumer Products and Interactive Media (DCPI), Studio Entertainment, ABC Television and ESPN. "
Disney as a whole came in at a whopping $53Billion in retail sales for FY 2017. Disney no longer reports individual sales for each of it's brands, but Marvel Entertainment USED to be a different division before it was rolled into Disney as a whole. The last time that was true (around 2010) Marvel's 2009 retail sales were 4.9 billion, 2010 retail sales were 5.6 Billion, and 2011 retail sales were about 6 Billion.
Note that Avengers 1 didn't hit theatres until 2012. The Marvel brand is WAY, WAY bigger than it was in 2009-2010.
Sanrio in its entirety comes in at #11 at 4.6B. Pokemon at #18 at 3.5B