Congratulations, you just made me grin.

To the eye of the public, which either forgot about JJ2 or never knew about it at all, Jazz is childish. Sure, Jazz might wield a gun, but he is green and his gun is blue. The mainstream gamer, which you are supposedly aiming at, will not suddenly go playing a 7-year-old game with a "kiddy" main character that needs several patches before it plays like it should. They won't be willing to pay for it either, and as far as I know you are mordicus against "piracy". They will probably laugh at the one in their class who reads a story about a green rabbit on an imaginary planet who is fighting against turtles. I don't think using Jazz as your avatar or signature would help much either. I am a frequent visitor of a forum that's mainly about gaming, and obviously a majority of the forum users show a game character in either their avatar or signature. Currently a lot of people use a Resident Evil 4 character, because that game is hot. This doesn't suddenly make me, or any others who weren't interested before, want to play RE4. The same applies for the art subject idea: it doesn't make people want to play JJ2. I see a lot of art containg game characters when browsing DeviantArt, but I never think "Hey, this is Megaman, let's play megaman!". Viewing nice fan-art of some forgotten eighties-band doesn't make me want to buy their CD's either.

Sure, it might catch the interest of a few retrogaming freaks. Those will probably download the game off some abandonware site, play it, get bored of the low-quality singleplayer game, shift to the multiplayer part, and notice it doesn't work. Some will then ditch the game, some will google this site and eventually find the patches. Some of them will still not be able to play because of for example router problems, so they get frustrated and leave. Only very few will even get to play the game online, and those might not even like it. The only thing that might work is telling people personally of this site - and let them decide if they like it or not.