this was a great story for a crossover of these two game sagas, but you will never be able to read or see

Or maybe similar to Marvel vs Capcom, that Vile and
T-elos fused to Defeat X and KOS-MOS?

What if Sigma was combined with the gnosis

I can imagine Shion taking an interest to X and Zero's human alike personality despite of being robots, especially X's pacifist traits. Wait until she learns that they are from the old forgotten age aka A.D. 21XX although their production year is around the end of 20XX.

Okay so T-elos won't get paired up with Zero, then how about she wants to fight X and Zero to see their capabilities? While Zero won't hold back a bit that he could even make T-elos weary enough, X on the other hand will hold back a lot because he hesitates to fight her only to see who's the strongest, causing T-elos to look down X as a mere powerless relic until later where X finally shows what he's truly capable of.

If I may add one thing: Both Mega Man X and Xeonasaga have religious references, mainly Christianity. Although the latter has more of it.

Putting that aside. When will you actually post the actual story?! Dammit, it's already 4 months, you know.

I'd start with though after Xeno ep3 Kos-Mos drifting through space and all, just landing in X's planet. And recovered by someone, I don't know who I'm not that well versed in the X lore really.

Three months has passed, and you still haven't uploaded the actual chapter yet. Come on man, don't make this potential story dead or hiatus before it even starts.

Nice idea, although I prefer the original X era after the classic. Ever since Project X-Zone opening which showed both X and KOS-MOS shoot their weapon arms, they have become my OTP.

Following this, I might make my version of X x KOS-MOS fic.

This is it... THIS IS IT! THIS IS WHAT I'VE BEEN WAITING FOR! Since I saw 'The Topic' on gamefaq board back in 2012...
You have my complete support!