That's so creepy, I was actually going to come post about this as soon as I got home! I was bored at work today and thinking about that TV spot (as you do

) and it occured to me that I'd forgotten all about that statue that
totally did not appear in Ragnarok at any stage btw. What's even more interesting is that, according to the 'Art of AoU' book, Thor's vision scene doesn't even take place in Asgard, it takes place in Hel. Remember those masked creepy looking guys that are hanging around in the background? They are the 'Peoples of Hel' according to official concept art:
So, that statue? Is in Hel, not Asgard. We know that Hel as a place exists in the MCU, both Loki and Thor have referenced it. But strangely Ragnarok doesn't mention and/or feature Hel at all, even though in the comics Hela is it's ruler. My personal theory is that Hel is where Odin was actually keeping Hela imprisoned (maybe she was named after the realm, or the realm was named after her), so she wasn't in a physical prison but rather being held in Hel and Odin's enchantment meant she couldn't leave. So if she did survive the end of Ragnarok (which she did, c'mon, there was an obvious flash of green where she was standing before Surtur brought his sword down) it's feasible that Hela may have simply teleported herself back to Hel (for a lack of anywhere else to go with Asgard gone), and that's where we (and maybe Thanos himself) will potentially find her in IW, hence the statue and Thor's whole vision in general coming into play.
Also, remember that random hooded figure that walks past Thor in that scene? At one point they were trying to hand wave that by saying it was Loki who was originally in the scene but then got cut out, but I've never fully bought that. Why would they cut out all other traces of Loki being in that scene, but leave in one random shot of him in a cloak walking past them? I don't think it's Loki at all, I think it's actually supposed to be Hela, dressed in a black hooded cloak as a nod to Mistress Death and her traditional look in the comics.
Every day I get more convinced that Hela is going to be in IW, it feels to me like they're just leaving little hints and clues like this everywhere to see if fans pick up on them. I feel like a detective picking up clues everywhere.

t: