This theory is a bit of a stretch, but I believe in it as much as I do in Old Brick Bob's prophecy, and I believe in it with all my might; even though my might may be little, but that's because I am little overall.
Anyways, Old Brick Bob always gets statues at his table referencing soon-to-come updates.
He had the Otherworld Statue miniature pop up on his table; it can't be just a sculpture he made since the miniature also has the floating crystals!
There's the prophecy that the Giant Ratboy would wake up, and Old Brick Bob's miniature statue seemed to do just that. Bear in mind it's a statue! A sculpture! So the possibility that it's a movable statue, sort of like a toy, is slim! There's also a possibility he just made different statues, sure, but he's always there, looking ahead and greeting us; what a busy man he is! He doesn't have time to sculpt it himself! And either way, the statue seems to have the same texture, so it's likely it just moved on its own.
How does Old Brick Bob get those? Some divine deity probably entrusted them to him, as a way to speak and warn on its behalf. Now tell me, what do you call a person that contacts a divine deity and speaks for them to us? A prophet!
On the last note, the Red Ogre Inn seems almost exclusively* have pictures picturing the sky, which is the theme of the next update! Sure, the sky is a common occurrence in paintings, but the ones at Red Ogre Inn seem to only have the sky or have it as their main focus.
Old Brick Bob is a prophet! Case closed.
*I say almost, because only one of them, the blue-hued one below the Hardened Bronze Set platform, seems not to have the sky, but rather fossils in some sort of wasteland.