Nothing about Hal/Sinestro at all.
This isn't their book.
Baz and Guy talk and then split up with Guy going to Oa while Baz and the chipmunk end up stuck in Black Hand's book where they run into him. Cue the end of the Baz plotline which will continue the next issue of GL.
Guy hooks up with Kilowog and leads an attack on the Guardians using Krona's gauntlet until Kilowog free's the rings of the Corps for the big fight.
John Stewart, Mogo and Fatality fight the Third Army and later get to Oa to join the big fight. Guess this was the GLC subplot
White Lantern Kyle and the New Guardians appear on Oa to also join the fight. The New Guardians subplot.
Atrocitus shows up with a Manhunter army and joins in the fight. Red Lantern subplot.
Cue the big epic fight that this entire event has been teasing with everyone vs the Guardians and their Third Army. But it never actually gets further than a couple pages or so and will likely not go any further despite all thos build-up and foreshadowing we've been getting ever since the DCnU started.
To finish off this story arc the Guardians get desperate and call on ore of the First Lantern's power which leads to this story's conclusion: The First Lantern aka Volthoom breaks free and declares that everyone will be no more to conclude this story leading up to the next mega event of "Wrath of the First Lantern"
This book pulled in various sub-plots from all the GL books. What's so wrong about that? Who said this issue was even supposed to resolve any of them?
For the record what really annoyed me about this cash grab of an event
This was a "cash grab"? Looked to me like it was self contained to the GL books. I wouldn't even call it an 'event', more like a cross-over between similar themed titles.
For the record what really annoyed me about this cash grab of an event is that there is usually an ending in these multi book events. A definitive moment that wraps stuff up despite laying the seeds for the next one.
There was none here. It went from the middle of the climax of the story titled "rise of the Third Army conclusion" to " to be continued in "Wrath of the First Lantern".
No story in this was ever finished, it just got tacked on moments to continue everything into the following issues with no resolutions at all.
It's comics - no story is ever over until the characters are dead or the book is cancelled. Comics have long told stories with subplots that eventually were continued all the while including new sub-plots along the way to be told later (i.e. Claremont's X-Men for a bazillion years).
That this story will move to the next story doesn't surprise me at all.
But the one thing I have to disagree with you on the most ...
What a load of shit.
Everything you mentioned from Guy & Kilowog leading the charge, to Mogo reforming, to Kyle as the White Lantern on Oa to the "epic" fight and the guardians running desperate, etc... to this reader, THAT'S why I loved it. It pulled all the pieces together and pushed the story to it's next phase.
I admit the actual fight was briefer than I would have liked, but I don't think it's as over as you say it is.