That's the one. Well done.
Clue #1: if not today, then maybe tomorrow < in reference to Calvin Russell's "Soldier", whose chorus goes
I'm just a Soldier
Fighting the sorrow
Holding my head up high
I won't beg steal or borrow
Oh and if not today
If not today- If not today
Then maybe tomorrow
"I'm just a soldier" is said by Blaze just before the solo (and the cd glitch on my version by the way).
Clue #2: when Nick Simper meets AC/DC<
After being fired from Deep Purple, Nick Simper founded the band Warhorse, and AC DC released the song "War Machine" on
Black Ice. // "War horses, war machines, curse the name of liberty"
Clue #3:
The battleground site where the characters most likely die in the ultimate scene of the series fade into this poppy field. The war is WW1, one the most pointless of all (one good article among many:
https://www.theatlantic.com/international/archive/2014/07/world-war-i-tragic-futility/375103/) // "in the fields of futile war"
Clue #4: bread, butter, cheese, ham, salad and pickles < the ingredients to "the ploughman's lunch" // "once a ploughman hitched his team"
Clue #5: it is a tie < "After the war, left feeling no one has won"