[The poster will be posted here soon]
This is the runic text on the poster:
It is written in the runic alphabet known as the Elder Futhark (where "futhark" are the first letters in the alphabet).
The imagery on the poster is inspired by two Swedish rune stones, the stone G 110 at Tjängvide on Gotland, and the stone U 35 in Svartsjö on Ekerö near Stockholm.