Aldo would get destroyed, it would be a completely 1 sided fight. Khabib is far too big, and far too good.
Stopping big solid, 190 pound, 5'10 Kebab's relentless wrestling style is a hell of a lot different to defending a double leg from a tiny little 5'5 manlet, that Aldo is used to doing.
Not to mention he'd jab the shit out of Aldo and bust him up standing, like he did to raging Al.
I like Aldo, it's hard not to, but WEC was his prime. He's not only shopworn at this point, but he's ridiculously undersized at 155. He'd get fucking molested by the elite full size 155 pounders like Tony and Kebab, not unlike the Max fights.