Every now and then, usually on team books, a New Guy turns up which is always an excuse to plaster them all over the cover:
And sometimes it's not a guy but a gal like the time Dr Fate was a woman and joined the Justice League again. For the first time.
But it's not only team books - solo titles get the New Guy treatment as well:
You gotta love John Stewart pushing Hal Jordan out of the way as he proclaims that he's Green Lantern!