Just like Iron Man 2 teased Thor, Captain America teased The Avengers, and Ant-Man teased Civil War, we may see Thor: Ragnarok tease the next installment of the MCU: Black Panther.
With the Ryan Coogler film set to release just months after Ragnarok, it almost seems like it would be a waste of an opportunity if Marvel didn't remind the cinema full of fans that Chadwick Boseman would be on the same screen very soon.
However, at this time there is no real character or story link between Ragnarok and Black Panther, as it seems the latter will function more as a stand alone film. Though this didn't stop the Thor scene from appearing after Iron Man 2, it was certainly more effective with Captain America and The Avengers.
This is because the films were connected by Captain America - the man we'd just watched for two hours. Similarly, the Civil War tease after Ant-Man was a scene about Ant-Man.
Depending on how many post-credit scenes Ragnarok has, there simply may not be room for the Black Panther tease. Marvel's marketing machine has been working to ensure people know and are excited about Black Panther, and we will likely have another trailer soon. Therefore, Marvel may be better using this opportunity to expand on other aspects of its vast Universe.