I actually found the two-parter a bit underwhelming tbh, which is a shame because the buildup to the Catalyst Comet was great: a nice slow buildup pretty much all season, but then I felt like too much suddenly got thrown in right at the last second, with an unusually heavy-handed speech/discussion/choice about life the universe and everything, and when it was all said an done it was sorta like "oh. well that happened".
Namely, I feel like it could have been more effective to reveal that Gunter was an Eldrich abomination earlier in the season rather than at the 11th hour, with a little more foreshadowing before that. There's always been jokes about how Gunter's evil, and "Hoots" was a great reminder about how the penguin's got darkness beneath the blank, whenk-ing face, but it still felt a little ass-pull-y that he's "before there was time there were monsters"-tier horror, and then there wasn't really time for it to sink in: before we had time to worry what Orgalog was planning with PB and the pink comet and build anticipation and dread (i.e. how we feel every damn moment Sweet Pea is on screen, which is amazing), it was happening, and then it was over. That was admittedly partly the marathon's fault, but still, a few episodes as buffer would have helped - like, even if "Orgalorg" was the first episode of the marathon, that'd've been better (especially if "Hoots" aired even earlier in the season to keep the bombs spaced out).
As it was, we only got the Martin episode, which, taken by itself was an interesting lead-in to the finale, like how "Billy's Bucket List" lead to the last two-parter, but even that was sorta dampened by the fact that "Orgalorg" was also filled with random aliens, so it was like "oh, more non-standard stuff". Plus, it was the third episode in a row without Finn and Jake, preceded by one where they spent most of the episode as food products while we learned about Mars, and even that was preceded by a heinously ugly (imo) guest-artist episode, and before that, Finn & Jake-light "Hoots" and "Graybles 1000". I love episodes about the supporting cast and all, but interspersing regular episodes between them is what makes them fresh treats.
But anyway, ignoring the last-minutness of the Orgalorg stuff and less-than-ideal episode schedule, while it's been obvious for a while, it was nice to finally get solid confirmation that Finn was a comet (like the Lich - hope this comes back in future conflicts between them), and it was cool to see PB's Cosmic Owl dream come true - and also Jake's from way back when (not a croak dream, just a regular prophetic dream all along). I wonder how long she will not be the Princess of Ooo - it could be a long-ish term thing, especially in light of her earlier spy-network-shutdown character development, or it could be like when she was turned back into her regular old self the very next time she appeared in an episode after she became young. It was also nice to see the return of the grass sword, in full appendage form now, although I think the last shot had him waving to PB with a regular arm, so again, we'll have to see what happens there, and what'll become of the Finn Sword.
It was interesting to see Martin thinking about Finn off on his shenanigans, and it was nice that the offer to aimlessly roam the universe was still open. But him just disappearing with the talking comet wasn't satisfying, tho, even considering his earlier lack of fulfilment over all the stolen treasure. It fits Martin to just want to adventure around aimlessly and go beyond the mysterious beyond with the comet and all that jazz, but there's still questions to answer about Finn's mother and his cosmic crime (yes, there is a satisfying answer there: Finn accepts you're a deadbeat so no need to make excuses or whatever or that but at least tell him the full story, argh). Hopefully he'll be back again sooner or later - Finn's Cosmic owl-influenced dream about him and Sweet Pea sorta requires it to happen, right? Unless it was a reverse prophesy about the Citadel or something. On that note, I'm actually glad the Lich wasn't involved at all - there was enough going on here already. Plus, in both cases, and the earlier "what becomes of PM?" stuff, and the Betty (and Magic Man) stuff from "You Forgot Your Floaties", and the matter of what they do with Gunter/Orgalorg, gotta leave stuff for next season.
And that's what I have to say about that.
