His market value doesn't command that. The 20 Million+ guys are all edge rushers who are the most important players on defense.
Leonard is a 4-3 Outside LB If you narrow the contracts down to 4-3 OLB's the market tops out at 13.5.
He can certainly set the market here but let's be honest he's not in a high value position on defense. When all is said and done there is a good chance that Turay gets paid more than Leonard even though Turay isn't a pro-bowler.
I don't hope he does either. I'm just saying it is one plausible option. I personally think AV needs to hang them up. he's done enough and is going to be the GOAT kicker for decades to come if not forever. no one else is even close to his stats and records.