Asgard

Asgard has been the place most strongly associated with the Infinity Stones to date in the Marvel Cinematic Universe. An Infinity Gauntlet was seen stored there in the first Thor movie (whether or not it was a fake copy is unknown), the Tesseract was stored there after the first Avengers movie and the Aether was there during the events of Thor: The Dark World before being handed over to the Collector.

Odin knows how powerful they are – he explained about them in Thor: The Dark World and didn’t want two of them to be together in the same place – so he will be keen to prevent Thanos from wielding them (assuming the Allfather is still alive) during the Infinity War movies.

Whoever is lording over Asgard come the time of the Infinity War movies – possibly Thor after the events of Thor: Ragnarok – will undoubtedly prepare the Asgardian army for war (which will, of course, include the likes of Sif and the Warriors Three).

If Odin is still around, audiences might actually see him get serious in battle for the first time – goodness knows the Odin Force would be a welcome help against the Mad Titan with the Infinity Gauntlet.