Yep, if we want to all throw in behind a single incentive then a FF6 character name is the best bet. There's a couple games where we could maybe get a filename but it wouldn't show up all that often. Assuming the 100% route hasn't changed much in the past few years.. the best characters would be Celes, Edgar, Setzer, or Gogo since they're the ones who fight the final boss. The first 3 especially because they're got so early on. Other good choices are the ones who go to the final dungeon and are got early: Sabin, Locke, Terra, and Cyan.
Edgar is probably the best grab, but getting Setzer would also be cool because his Joker Doom and Reverse Joker Doom techniques are so critical to the run.
If we wanted to do another tribute to Ryan, Mog is another good choice. While he's got somewhat late, he also goes to the final dungeon, his Moogle Charm is a big help to a speedrun, and I seem to recall Ryan talking about him and his voice from that FF6 commercial.
We could also name Umaro 'BEAST', 'GBEAST' or some variation on that. Umaro is got super late and then completely ignored immediately afterwards though.
It's a shame Koffing isn't part of either of the Pokemon games' routes. Sometimes runners will take incentives on the fly to do things for donations, but such a deviation would require a pretty sizable donation and it would be tricky to try to organize.
If you're new to these events you should keep an eye out for: Super Monkey Ball 2, Blasto, Super Meat Boy (blindfolded!?), Mischief Makers, Battletoads & Double Dragon, Super Ghouls 'n Ghosts, Goldeneye, Castlevania, Bionic Commando, Mega Man X, Super Metroid
Should be another great marathon!