Yah me to they didn't do anything with it in the originals, maybe Arceus lives there? Kidding but still it could house some cool stuff.
The professor gave it to you and you received by connecting your phone to the game.
No objection there it will probably be like the other WI-FI events in Japan.
Sure, but what if it is like Emerald were you complete the national dex and you get the GS ball as a reward?
Well you never know what they will do untill it actually happens.
But it is more like a reward than a storyline event and the WI-FI events are programmed into the games already so it would be the same except you don't need WI-FI to get it.
It would be a nice reward for the almost impossible task of completing it(without cheating).
Okay but it would still be cool as a side mission.