Great job, thankfully I wasn't there to stop you every minute for context trivia...
Talking about UNISOL as an EXPENDABLES movie before its time is absolutely right and it felt like it back then. And I think the idea of pairing Dolph and JCVD came from Carolco/Mario Kassar who at the time had also tried their luck with a Sly/Arnold team up (although what they had in mind for that was not an a pure action flick but more of a John Hugues comedy actually).
When UNISOL was officially announced in early 1990, it felt like huge news, Dolph was actually considered the bigger name (VD didn't have the LIONHEART, DOUBLE IMPACT successes yet) and something that was to be anticipated for the next two and half years until it finally got made and released. But the project/original script itself goes back to the mid-80's and had another another star attached early on (not meant for a star pair-up though).
The project sounded more like typical/cheesy sci-fi action back then, like CAPTAIN POWER meets CYBORG, but I wish we could have seen that as well in a way, it could have been fun, at least to have it set in a farther future rather than 1994...
P.S.:
Regarding the subject of punchlines, I agree we don't have them anymore, but I remember the mentalities of the audiences and filmmakers back then soon moved on from that type of humour, which was overlooked and considered cheesy of bad writing (whereas anyone today can agree it's much better than what is written now). Then the 90's and 2000's integrated more 3rd degree and cynical humour while bad politically correct humour also spread... You mentioned the Emmerich and Devlin commentaries, in both tracks they recorded 10-13 years after making the movie, they even couldn't keep from mocking the punchlines and "typical 90's" stuff...