Oh I see. Anyways, I guess I will give my take on this.
Personally, I do believe Geno is an E3-tier character. I know he only had one major game appearance and isn't iconic in the slightest, but he is still a highly requested character in his own right and he would make headlines as is just because its Geno and his long years of lasting fan demand would definitely be something to get hyped over.
Now, I do see where you are coming from on how SMRPG didn't release in Europe until the Wii VC, HOWEVER, since then I feel like support for Geno in Europe has gradually increased. Not only that, but E3 is an American event, meaning most things that will get revealed at E3 will mostly pander towards Western audiences. Thats why Banjo was shown off at E3. He is not necessarily popular in Japan, but since he was a highly requested character that originated from the West, it made perfect sense to reveal the duo at E3, and same case for Geno. Geno mostly has a Western fan following, meaning revealing a character that is highly demanded at a Western event makes a lot of sense imo, but thats just me.
Anyways, I see where you and
CannonStreak
are coming from, but I don't personally agree