I Have Never Seen 1 EXPENDABLES Movie EVER

That's fine. I enjoyed #2 the most. It's just an action flick with nearly every 80's and early 90's action stars together. If you weren't interested when they came out, you won't miss much. For me, it was fun.

The previous 3 installments didn't have much of a plot and could be considered as standalone films, it's not an ongoing story like The Godfather or Star Wars... you won't be lost if you watch any of the Expendables movies without having seen the previous entries.

I have never watched the Mission Impossible stuff. It seems so fake.

The 2nd one is good, Van Damme was a great villain. The first and third each had there moments but were largely forgettable.

4 is looking pretty bad from the trailers, but I hope I'm wrong.

You ain't missing nothing unless you love the action flicks of the 80 & 90s. Story lite, nostalgia heavy.

I've seen the other three Expendables movies but I probably won't bother with this one (and I've never seen a F&F movie).