Of vexillological note in Deadpool 2, the ionic national symbol of Canada can be seen in the background: a red maple leaf on white.
Coincidentally the scene is reflective of the original Aha! video where a man of artistic dimensions crosses over into another reality to invite a lovely lady upon a wonder lust adventure of the heart. Although the hero of graphic novel will be gone in a day or two, they share a special moment in this realm of stories.
Thus it is of perfect concord that a comic book movie should reprise for that ever enchanting song from 1984. It is song that beckons us to follow our hearts and make that leap to the other side of mystery and the unknown. Although danger may be present, this unreal dream of art is able to make an impression more real than reality itself.
Like memories past that gain a certain gravity after they are gone, Lunar Twilight is that extra goodbye kiss from yesteryear that can sooth the aching heart.