Icon Comics

Icon Comics was an imprint of Marvel Comics for creator-owned titles, designed to keep select "A-list" creators producing for Marvel rather than seeing them take creator-owned work to other publishers.

From the Wikipedia article “Icon Comics”, licensed under CC BY-SA 4.0.

Comics and manga publishers typically acquire through creator pitches, portfolio reviews at conventions, contests and agents. A pitch package normally includes a series synopsis, character designs and several finished sample pages. Many publishers post open-submission windows; outside them, unsolicited material may be discarded.