Trek is about exploring strange new worlds and being a man, NOT about war which is why DS9 and your sickening proposed three arc war movie will NEVER be Star Trek!!!
Sigh. This again.
Star Trek is an exploration of whether the ideals of secular liberal democracy can survive in a dark and nasty universe full of danger, deceit and enemies that will stop at nothing to defeat you.
You can use stories about exploration, diplomacy, war, technology, personal struggles and more to advance that theme.
TOS did all of those story types, so there's nothing "wrong" about doing more war-centric stories with the
TOS era characters.
DS9 did all those story types, too, incidentally, and it's the best
Star Trek series ever.
Star Trek is about heading out into the unknown, exploring space, meeting new species, that kind of stuff.
Have you people even watched
TOS? How could you have missed episodes like Balance of Terror and The Enterprise Incident that were about war, or The Trouble with Tribbles and Journey to Babel, which were about diplomatic squabbles (the sort that take place when enemies are stopping just shot of war)?
How about Mirror, Mirror and A Taste of Armegeddon, which were about the
TOS crew trying to deal with the warlike impulses of newly discovered cultures?
TOS deals with war in all its facets - which isn't just limited to all-out shootin' war. (
DS9 also covered war in all its facets.)