What if some of the earlier Mega Man X games were remade in the style of Mega Man X8 or Maverick Hunter X? YouTuber X MavericHunter explored the idea with a few proof-of-concept videos that you might want to check out.
And an older X4 concept:
Pretty neat, right? Mind you, these aren't intended to be playable. But, man, do they really make me miss Mega Man X!