Series Continuity
I perused the boards here and there's a few people talking about this, but in great detail that is way too deep for me, admittedly just a very casual fan. Never read the comics, but I've seen all the movies, albeit only once. So asking for a very simple, basic answer, like you're talking to a child...
The movies all seem to make sense when watched independently of each other, but is there ANY continuity from movie to movie? It seems like characters are constantly killed in the end of a movie, then they're just inexplicably back in the next one. Does anything matter? Is it all "different timeline" mumbo jumbo?
Not looking for a fight, so please take your yelling elsewhere, just a simple explanation.