My original tumblr post was here. This mock comic book cover image was originally posted on Tumblr by BRUDE’S WORLD and comes to us via Erotiterrorism Cell 69. The original poster gives the source as Super-Team Family — The Lost Issues, a site which specializes in imagined comic book team-ups and cross-overs that never were. A personal favorite:
Awesome.
My original tumblr post was here. This beautiful, haunting short comic was written by Ehud Lavski and originally posted on his tumblr . It was drawn by Yael Nathan. Lavski notes in his comment “If you like it, please share.” Many people on tumblr have. Commenter gynoidwren” remarks that “This reminds me of The Secret Knots.” Commenter Dirty River remarks “The magic of night radio and includes a picture:
The post comes to us via comichquadrinhos.
My original tumblr post was here. This comics panel was originally posted on Tumblr by Monsters in Love with the following humorous/explanatory text:
For good or ill, Gaga’s impact on fashion will resonate well into the 30th century.
Planet Comics (Jan. 1940)
My original tumblr post was here. This image is the cover for a comics series called Magnus, Robot Fighter which first appeared in 1963. Here is the cover with original context from Comics.org:
The image was originally posted on Tumblr by TOMORROW & BEYOND and comes to us via Fifi~ Feeling is First.
My original tumblr post was here. This image was originally posted by artist Francesco Francavilla on his tumblr with the following explanatory text:
NEBULINA
GRINDHOUSE Cover Art by Francesco Francavilla
My last cover for this second season of Dark Horse’s & Alex De Campi’s GRINDHOUSE series.
Out in July in comic shops.
Cheers,
FF
Since this originally posted in 2015 I believe the comic should be out by now. For an in-house blog post on the series, see here.
My original tumblr post was here. This image was originally posted on tumblr by Enjoy. It appears to be a crop from a Night of the Living Dead comic published by Doubletake:
Found at the Doubletake site. 
My original tumblr post was here. This image was found on Pinterest and first posted on tumblr by michaelallanleonard, where it is attributed as “Alex Schomburg, November 1947.” It comes to us via Reginald Juice.
My original tumblr post was here. This comics cover was originally published on tumblr by spicyhorror where it is attributed as “Wonder Woman No.26, Nov.-Dec. 1947 by H.G. Peter.”
My original tumblr post was here. This appears to be the first page of a six-page comics story from a 1952 comic book called Space Ace. I reposted it with the snark “In real life, there’s never a space patrolman around when you need one.” It was originally posted by prehistosaurio.
My original tumblr post was here. This tube girl image was first posted on tumblr by Superdames! with the attribution to Weird Adventure #10 (1951), by Alex Kotzky.