Decoding the hidden messages

The last bits of flashing images appear to be an alien language. Naturally, players are assuming its Eridian. Some fans ran it through a substitution cipher and got the following results: “HE IS WATCHING” and “BREAK FREE.” Not ominous at all! But is the “he” referring to the hand in the trailer or something else, perhaps hidden in the Great Vault or another Eridian installation? It’s got players thinking about The Watcher, a Guardian from Pre-Sequel who prophesized a great war.