Final answer:
As of early 2023, the most recent graphic novel by Neil Gaiman was not specified. For the latest information, consult Neil Gaiman's official website or his publisher's announcements. His famous works include 'The Sandman' series.
Step-by-step explanation:
The most recent graphic novel by Neil Gaiman had not been announced or published by the knowledge cutoff date in early 2023. Therefore, to provide an answer in 200 words with certainty, it would be necessary to have the latest updates on his publications, considering he is an active author whose works are released periodically. When discussing Neil Gaiman's graphic novels, an essential resource for obtaining updated information is the official Neil Gaiman website or the author's publisher's website for any recent news or releases.
Readers and fans seeking insight into Gaiman's creative works may also want to consider his established catalog of graphic novels which includes seminal works such as 'The Sandman' series. 'The Sandman' has gained critical acclaim and is often cited as one of Gaiman's most notable and iconic contributions to the graphic novel genre. For the most current information on Neil Gaiman's graphic novels, direct sources such as the author's official communication channels should be consulted.