I feel without Caesar the Legion will crumple.
Nah, they won't crumble, but they will change, whether Caesar lives or died, whether they win or lose, they will change.
I'm more interested in the synthesis if they win and Caesar lives, but I'd be okay with Legion losing if Lanius gets persuaded to just walk away.
The synthesis will evolve Legion into what Caesar planned, possibly starting a new form of government within the Legion. (With Caesar still as the top dog.)
But them losing and Lanius walking away could also be interesting.
Instead of Lanius focusing on war he'll focus on strengthening the Legion lands and might change a little.
Cause as Lanius is now?
Spoiler
I mean, he takes over Boomers and a lot of legionnaires loses their lives.
And he'll more than gladly send legionnaires after The Remnants despite them being far superior.
So either of these two could really help the Legion in different ways.
But Caesar and Lanius dying?
That might mean civil war and them breaking down.
I don't think it's likely to happen but there is always a chance for it.
And I don't think it's fair to just let them break up to various raider tribes again after getting such a [censored] implementation in New Vegas.
So anyway,
when they're brought back they won't be the same as in New Vegas.
Hopefully the change isn't some [censored] "They're in a decline" bullcrap. (If anyone should be in a decline it's NCR after 3 [censored] games...)
The Roman Empire was more or less like this but you don't see them as "the scum of the History".
In fact, most people have high opinions about them.
I'm not very knowledgable on history but didn't they kinda unite the world too? (The lands they conquered at least)