I watched the expendables sequels; they were enjoyable if a bit barebones. I do like how the movies tend to have soviet backdrops, in 2 The Expendables shelter in an "America Town" before a 1970's looking New York Street gets blown away by a tank. I also feel like the America Town is meant to illustrate Stallone's age.
Three does away with the subtext, Stallone flat out cuts his veteran team out of the operation, recruiting a bunch of young soldiers, coldly explaining that he doesn't want to care about them if they die.
Bruce Willis' "Mr. Church" character is replaced by "Major Drummer" played by Harrison Ford.
I'd say the sequel was superior to the threequel, The only real plot in 3 is "Kill Stonebanks"
Gibson turns in a more menacing performance than Van Damme, but I wanted more. We hear that three teammates died on the mission Ross shot Stonebanks on, and it is implied there was a betrayal, but it isn't fleshed out.
I think that's me overthinking the movie though. I also kept expecting one of the new mercenaries to turn on the Expendables, but that doesn't happen either.