Condensing several things into one thread:

A few days ago I routed out what 117 Exit would probably look like: Spoiler Warning

I've also LOTAD'd what some restriction categories could be: • No Sonic Shortcuts - It's worth noting this category also does All Castles since the branch paths are fastest going through each one. • Low - More accurately "(Almost) Low%", Pac has broken links across the site...

Other possibilities, regardless if they're realistic to actually speedrun: • Lunar Dragon - Although there's only 6 moons in total, using the same name as SMW's category makes more sense than "All Dragon Coins", and the rules transfer over, too. I've found some levels that have Dragon Coins but not 5 in total, which is weird. The sad part about this category is, while it makes the route follow the 'intended' path more, some levels are still skipped in nearly their entirety. • (Almost) No Cape - Along with (Almost) Low% above, the "Almost" part comes from the fact the very last level absolutely requires cape, so all other levels would forgo it, assuming it's possible. • (Almost) No Cape, No Sonic Shortcuts - I guess as a copy of "No Cape, No Starworld", but I don't see it being ran for longer than the others beside all exit ones.

And of course there's plenty of meme category possibilities which aren't worth bothering to mention until someone actually runs one.

Edit: Eh, I'll mention some anyway for my own entertainment. • Beat Thirdspace - This one isn't terribly unlikely for someone to run. • **(Almost) Small Mario, No Sonic Shortcuts ** - Low% should be possible if Yoshi is allowed, so the name is distinguished. • All Switches - Very possible, along with optional restrictions. • All Forts / Ghost Houses • Min Cape Max% - Now THIS is a good meme.