There was a rumour that both companies might stop producing new comic books.
Instead, since the demand for back issues is so great, they might must reprint past stories, be them in graphic novels (for complete story arcs), or as a larger omnibus.
If an offer is right, then they might allow a third party publish new comics (for a fee/license).
Otherwise, even if they decide to go full digital, they will not make enough revenue to make up for the loss of fans who want the physical comic book.