#2 Soft spot for Styles to land
It's no secret that WWE is running out of time to find an opponent for AJ Styles at WrestleMania 36 and putting him against The Undertaker would probably be a best case scenario. Beyond that, it could serve as a launching point for Styles after WrestleMania 36 if he is somehow able to win.
Keep in mind that Styles had his momentum derailed after an injury at The Royal Rumble and he is now in need of some kind of landing spot. Yeah, maybe there are other matches that seem more appealing on the surface for Styles, but how many of them are realistic based on current storylines?
If nothing else, a lot of the WWE roster is starting to get paired up for WrestleMania 36 and there really aren't too many choices left. There are also next to no matchups that would really be meaningful to watch play out, which is part of what makes Styles versus Undertaker such a good option right now.