I have noticed that LEGO sets from the past few years of their Star Wars theme include a prominent, or at least noticeable, Disney logo, typically in one of the corners. For example, see this Imperial AT Hauler set, with the trademark quasi-signature Disney logo in the lower right corner:
On the other hand, Marvel Super Heroes sets (e.g. the Thanos: Ultimate Battle set below) do not seem to include a Disney logo, despite the fact that both Lucasfilm/Star Wars (since 2012) and Marvel Comics (since 2009) are owned by Disney.
Why is this? Is this primarily a result of different contractual clauses in the specific licensing agreements for Star Wars and Marvel (i.e. this is done for legal reasons), or is this primarily a marketing decision by LEGO? I could easily see how they might do this to make it seem less violent and more appealing to parents with small children - "No, son, Star Wars is a really violent series about a father and son that are always fighting and chop each others' hands off, then team up to throw a local politician down a pit - wait a minute, it's Disney? Ok then!", but then that doesn't explain why they wouldn't do the same with Marvel, which also has a lot of young fans.