Give me a MMA anology for the Floyd vs Pac fight

So I know this fight was ideal 5 years ago and Floyd is slightly past his prime and Manny is well past his. What champion vs what challenger in a theoretical MMA fight is analogous to this fight?

Jones vs Tito or Shogun or Couture happening now?
Weidman vs Wanderlei happening now?
RDA vs Penn?

What is the MMA equivalent to this fight that captures where Floyd is at and where Manny is at.

I know a lot of people thought it was a pick-em or even that Manny was the favorite five years ago. Now nobody is giving him a shot.

Anderson Silva vs. Nick Diaz Phone Post 3.0

I'll go with Fedor vs Couture. Maybe not now, but not like in their primes either.

It's the fight everyone wanted but never happened.

This one is happening, but later than it should've. Phone Post 3.0

I really wanted to see this fight four, five years ago as a casual boxing fan who watches 5-10 fights in an interesting year and I just feel disappointed in the fight already.

It really feels like it would if Jones was fighting Tito tomorrow.

Its like Rickson vs armbar.

I feel like it'd be like Jones vs Silva. Two dominant guys, both have fought at 205 and dominated most of their opponents. One more than less loved, the other isn't universally loved but surely dominant. The main difference with that fight over Mayweather and Pacquiao is that one of those fighters is still in their prime.

Even though everyone was calling for Mayweather and Pacquiao a few years ago, I'm still glad that we'll get to see it though Phone Post 3.0

GSP Silva
It's the fight the fans wanted Phone Post 3.0

Figure out who CRE is guaranteeing to win.

Put your cash on the other guy.

Fedor vs Couture

Jones vs. Silva

Pure fantasy? GSP vs Brock.

Realistically? Fedor vs Brock before Fedor's losses.

A distant second realistically would be GSP vs Silva.

Jones unfortunately is in an age of over saturation so it's not really the same.

But nothing comes close to 50% of this fight.

Personality :
Mayweather similar to Bones
Manny similar to Fedor

Fighting style:
Mayweather similar to Gsp
Manny similar to Trt Vitor Phone Post 3.0

Silva vs. Sonnen 1, but Sonnen wins.

Enjoy it.

Barrington Levy - Silva vs. Sonnen 1, but Sonnen wins.

Enjoy it.

I get you.

You're saying Mayweather gets triangled then pops for steroids after the fight.

Bucho - 
Barrington Levy - Silva vs. Sonnen 1, but Sonnen wins.

Enjoy it.

I get you.

You're saying Mayweather gets triangled then pops for steroids after the fight.

Isn't Pac the "white" Chael dude?

I don't get you.

Dana vs Tito? Phone Post 3.0

Reminds me of Fedor vs Cro Cop