Hey, I know what you're thinking - oh great, another pretentious asshole spewing some diatribe about how great/lousy the Lost Finale was with some loose tie to video games in order to justify its presence here. But you may want to hold your tongue. It'll keep your fingers occupied long enough for you to read before channeling your inner YouTube commenter. First, a little housekeeping - if you haven't seen the final season or can't be arsed to read a synopsis on Lostpedia
or wherever, then jog on. Second, I'll keep this incredibly brief as possible, but will still include a tl;dr at the bottom because we're all sick of Lost-related meandering soapbox posts.
In Brawl, the adventure mode, or The Subspace Emissary, finds the cast of characters ripped from their respective games and thrown into this new, alternate world, which contains familiar surroundings, but they aren't quite the same. Each character remains the same at their core - Wario is still a disgusting big nosed creep, Dedede remains a clumsy oaf with a good heart who is only a villain until he can find a jelly donut, and Peach still can't manage to retain any of what made her good in Super Mario RPG. Each character is introduced in a manner befitting their original game, and have a small part in the overall story that accents both their original game and character personality. New connections are forged, with villains joining together, heroes working together, and never before seen battles springing up in new locales. They all eventually triumph over the axis of villains to unite in their cause of moving on from this alternate, twisted world.
I don't care what part of either entity one interprets as a limbo or purgatory, <tl;dr>
that whole flash sideways was just the The Subspace Emissary mode of Smash Brothers Lost. </tl;dr>
Sadly, they never unlocked Frank Lapidus.
LOOK WHO CAME:
Dr Light ate your Magicite