“Stay tuned” would be perfectly acceptable even for print. For sure, it originated with media needing tuning, but has come to be a more general term meaning “keep paying attention for new developments.” See the description in Wiktionary: (idiomatic) To remain as a listener or viewer of the particular radio station or television channel to which one is currently paying attention. (idiomatic, by …
https://english.stackexchange.com/questions/218922/equivalent-to-stay-tuned-but-not-for-tv-or-radio



