Magazineland Comic Book for 1977 with Marvel and DC Characters and More!

What a interesting item we have for you today.
I'm positive that this booklet was created for the Magazineland, USA celebration circa 1977.  It was attended by Phil Seuling the famed comic convention organizer.  I have provided a link to a video of this event here.
If you have any info on this, the Captain would love to hear from you!