On we go with Seven Soldiers #0
Slaughter Swamp - this is where Cyrus Gold, AKA Solomon Grundy, died. True Thomas - this is the 'real' Thomas Dalt, rather than the one remade by the Seven Unknown Men.
First appearance of the Sheeda in 7S
"You've got a bit more depth to you, eh? Two sides, at least" - Poss. related to the metafictional element? There seem to be several moments where the characters realise or almost realise they're in comics. Related to Morrison's idea of making the DCU more 'sentient'? He has two sides, hence two dimensions, as opposed to the three dimensions of the real world. Also a reference to I, Spider's dual hero/villain nature? Also, given the 60s Marvel feel of much of 7S, could this refer to the longstanding joke within the comics industry that Lee & Kirby's big leap was to go from one- to two-dimensional characters?
"Old gold place" - while referring to Cyrus Gold, the colours red and gold turn up a *lot*...
The seven rooms labelled with Roman numerals are reminiscent of the doors in the camp in V For Vendetta (room 5). Given the huge number of Alan Moore references dotted throughout, is this the first?
Seven Unknown Men appear to represent writers/editors?
Nice nod to Kirby with the Kirby dots on the pogo sticks
Black Piss beer is a new brand on me ;)
"A veteran, some newcomers, a tough guy" - sounds like a description of the eventual team.
The giant spider surviving for decades before coming back - little reminiscent of IT by Stephen King?
"Blood red whiskey" - *LOTS* of blood in this issue
"molted to a more adult form" - the first of the references that recur throughout the series to growing up, becoming 'adult', changing into a different form.
Items in 7 Unknown Men's boxes - Frankenstein's gun, Justin's tunic, Guardian's helmet, magic device resumably belonging to Zatanna.