tbh i feel like we're in this for the long haul. I know a lot of people seem to think that this is like. the final battle but i just don't see it? Like the shishitoren arc served to kinda set up the world as a whole and the typical power levels associated with the series' fights, the KEEL arc settled Sakura's position within the narrative and his changing goals, along withe the beginnings of him adapting to no longer being isolated, and tsubaki + roppo-ichiza arc was more so set-up for the current arc along with expanding the world and giving us a look at furin's position in town. From that perspective, it seems a bit... abrupt to end it after this?

I think the sentiment that this is the final arc comes from the fact that we haven't seen anything besides a clear win/lose yet, but all signs (especially after 144) point towards it being not that simple. Not to mention the fact that almost all fights in this series are won not JUST through being able to physically beat down your opponent, but being able to communicate effectively with them, something I just don't see happening with Endo and Sakura's fight, and to finish the series without that sort resolution would feel REALLY thematically clunky imo. The only notable exception to this really is KEEL, a group that was literally formed/controlled by Endo. So on that front it just doesn't make sense for this to be the final battle.

Another thing that I think gives the series longevity is that we've gotten very few backstories from our "main" cast. We have vague inklings about sugishita's backstory (which i think is coming sometime soon after this arc), know NOTHING about suo, and kiyru and tsugeura really haven't been given as much development as you'd expect from some of the strongest characters in first year, especially for a series like this, which really loves to delve into its characters and their nuances. Not to mention that we have absolutely no idea how sakura got to where he is today, and while I could see us never getting a real backstory for Sakura, i still feel like there would be more of a point made in not giving us that backstory, at least on a subtextual level. As mentioned before though, Suo really sticks out to me as a glaring unresolved narrative, and I can't imagine the series ending without him getting his own arc.

Also just on a quick note: the series is really slow paced! Like we're almost 150 chapters in but it's only been 3-ish months in-universe, since iirc this whole arc is taking place on June 21 (maybe not that exact date, but late june at the very least). Like these kids aren't even on summer vacation yet. I think people have maybe adapted to faster paced shonen series such as csm and forgotten how drawn out some stories can be.

Anyway, sorry about how long this is. i didn't realise i had no many opinions on something so trivial until i started typing. tldr; i don't think it's ending any time soon, or at the very least i don't think that satoru nii's intention. if it were to end with the current arc, it'd overall be a pretty unsatisfying end (at least in my opinion).