Can we get a special FFX event involving Sin?

I keep wanting a large scale battle against sin. Maybe something akin to Crystal Tower but it being a 120 player raid lasting a 30mins to 120 mins. Nothing difficult. A just for fun fight. The reward could be FFX vanity loot. Oh please for the love of Yevon let this be a thing!

Sadly, I don't think that will ever happen - I recall the development team being asked this in a live letter a while ago and they basically replied that they have no plans for any kind of FFX crossover event. The previous crossover events (FFXI/FFXIII/Dragon Quest) were for specific reasons (FFXI's eleventh anniversary, the launch of Lightning Returns ~ FFXIII and the first anniversary of DQX), so there would probably need to be a special milestone reached for FFX before it could be considered (considering the launch of FFX/X-2 HD came and went, that should be pretty telling that there's not going to be any FFX crossover I'm sorry to say).

Bahamut in this game is sin.