X-Men Apocalypse: 36 Easter Eggs, In-Jokes & References You Need To See

23. Jean Grey's Psychic Bed Sheets

As Professor Xavier's opening voice-over states, some mutants have the power of foresight, which can be troublesome to say the least. What he says basically foreshadows all of Jean Grey's arc: she has a vision of the future that she struggles to deal with and it ultimately leads to her ruin

In this case though, her ruin isn't seen by Professor X, as it will presumably come in a future movie after the price of her unleashing all of her powers comes back to haunt everyone.

Her foresight also seems to have bled into her pillows, since they seem to herald the coming of the Four Horsemen, and a battle.