Company crossovers aren’t a new concept. And one of the best mediums to
illustrate this is the comic character. One of the best early examples of this
is a book titled “All the Funny Folks.” Published in 1926, the book featured
several different comic characters of the day in one concurrent story. Over the
decades, this practice has continued. Of recent note, an extremely successful
example of this is the series of “League of Extraordinary Gentlemen” stories by
Alan Moore and Kevin O’Neill. Moore and O’Neill constructed a modern grouping
using characters from Victorian literature, making them a team of
sorts.

The 1940s were no different.

Here, Fawcett’s Captain Marvel and General Mills’ Jack Armstrong combine
forces for a contest, details of which are below, as seen in the letter from
Captain Marvel Club Headquarters:

“Hold everything for some sizzling hot news! I just got word from General
Mills’ Jack Armstrong about a brand-new contest – a truly sensational offer to
be announced on Thursday, March 29^th. It’s a simple “lots of fun”
contest open to all fellows and girls in America 18 years and under, with over
600 prizes valued at more than $13,000! There will be 13 winners in each of the
48 states and District of Columbia. First grand prize: an actual Piper Cub
Airplane! – A really honest-to-goodness Cub Trainer delivered ready to
fly! PLUS – 1176 hours of actual FLYING LESSONS.”

Now there’s a prize you don’t see being given away anymore. An airplane!
The letter goes on to remind Captain Marvel Club members to enter the contest.