This is how I fix my problem for the black screen when launching the game and I hope it can help with some of you.
How to fix black screen
C:\Program Files (x86)\Steam\steamapps\common\Mega Man X Legacy Collection
Go to config.ini and right click on edit
[GAME]
MouseBaseSpeed=2.000000
[GRAPHICS]
HDR=DEFAULT
AntiAlias=NONE
AltAntiAlias=NONE
DeferredLightingLight=APPROXIMATE_SPECULAR
DeferredLightingHDR=INTEGER_LOG
SLI=OFF
Stereo=OFF
TextureDetail=HIGHEST
TextureMipLimite=2
EffectVolume=HIGH
[DISPLAY]
Resolution=1600×900
Aspect=DEFAULT
RefreshRate=Unknown
FullScreen=OFF
Borderless=ON
VSYNC=OFF
[CPU]
JobThread=15
RenderingThread=ON
[JOYPAD]
A=2
B=1
X=3
Y=0
LEFT=15
RIGHT=13
UP=12
DOWN=14
START=9
BACK=8
LT=4
LB=6
RT=5
RB=7
LSTICK_PUSH=10
LSTICK_VERT=Y
LSTICK_HORZ=X
RSTICK_PUSH=11
RSTICK_VERT=Z
RSTICK_HORZ=RZ
[Window]
MainX=0
MainY=0
you can re-adjust to your prefer resolution.