I have seen these:

4 card set, 1 of 4, 2 of 4, etc. They parody old comic books. What comics did they come in ? Anyone know ?

Card SP1 and black bordered SP1 variant;
How tough is the variant to find ? They seem to be going for $ 50. Did this come in a recent comic ? What issue, and what was the ratio of the variant card, 1 in 20 ???

Any other 2014 GPK comic inserts ???

These were recently released by IDW and can probably be purchased at comic books stores. There may have been some at the NYCC.

Thanks. Any idea what the insert ratio was for the black variant ?

Someone posted on Facebook that there is also a rare RED variant on the SP1

No... I just called my local comic store. They had 3 sealed books left and are holding them for me.

What issues were these in ?

Someone said the SP1 also comes in a gold border version

My mistake--the 4 card set I saw was an insert set in the 2014 Series 2 packs, didn't come in the comics

SP1 and the black variant are in the IDW comics.

Looks like there is also an SP2 regular and black bordered variant, and now an SP3 with regular (white), a black variant, and a super rare yellow variant !

Tom, looks like both SP2 and 3 have hard to find yellow variants