This is also an attempt to get a hold of FireNels.

Having an Any% completion mode for a pinball game (i.e. infinite game) doesn't make any sense to me. We need categories that actually align with some of mini games, like time to beat the Omega Pirate, Thardus, the Prime Metroid (both forms), Meta Ridley. That way there's something to actually speedrun.

I would say any% makes sense since the game can be defined as "ending" on the defeat of Metroid Prime. If you want an example of this, take a look at the run done during the Metroid Marathon.

But from what starting point? From just choosing multi mission and getting there from Talon or choosing the Impact Crater?

I honestly don't know since I've never run the game, I just know of this run

I suppose that could be one, but I don't think the category was even intentional because no rules have been set up.

I'm not entirely sure how @FireNels became mod of this game in the first place...

He has set it up so the series mods have no power here.

Here's what I think would be good categories:

A completion mode where you start in either Talon or Frigate and ends with being the Metroid Prime.

Categories for clearing the Phazon Mines (choose single mission, beat the Omega Pirate), clearing the Phendrana Drifts (choose single mission, beat Thardus). I know for sure these two single mission modes have actual in-game timers.

If I was guessing, it'd seem that the other tables, the Temple and the Impact Crater, probably do as well, but I haven't unlocked those yet on this save.

There's also a multiplayer only table that's a "race to 100k" type of thing. It can be done with one person as practice. That doesn't have an in-game timer, but could still be run.