HBO knows fans love to read into things, so if they didn’t want this Tyrion hand speculation, they should’ve Photoshopped the posters differently.
Another thought-provoking aspect is that the hand that the Game of Thrones poster does not show — Tyrion’s right hand — is the same one his brother Jaime Lannister no longer has.
Could Tyrion lose his right hand in Season 8?
However, you have to consider anything and everything at this point.