Because it's the wrong fight to make lol.
Making the Leon / Belal fight 2 years later doesn't retroactively make Colby / Leon a well-deserved title shot.
Wtf are we talking about?
I don't really hate Jon, but YES! The whole point of matchmaking is booking guys that present a credible challenge. OF COURSE we are going to want to see someone who has the best possibility of beating him.
Jon is the greatest, most skilled, highest fight IQ etc of all time. Putting him in with another guy who is relying on skill/technique over physicality at this age is not the challenge we want to see.
THE WHOLE POINT of moving up to HW was that he would have to fight guys who presented PHYSICAL challenges to him since no one was going to outclass him technically or skill for skill.
Aspinall is a tougher physical matchup at this point, given age and lack of ring rust compared to Stipe.
Oh yeah, and he's the fucking champion lol
But to be fair to Dana, I guess having Stipe fight for the interim while Jones was healing would have been "disrespectful" to him lololol.