FYI:
The California Golden Bear was about the same size as a Kodiak Bear, yet it went extinct, while the California Mountain Lion is still around. Tell you something, about which is more resilient.
So
Given African Lion >>>> Mountain Lion > Brown Bear
Thats intresting to note; the atlas bear too also went extinct from africa, most likely the direct cause like all animals going extinct is because of man, but I'm sure other things come into play.
Nature its self can literaly erase an entire population of any living thing by earth quakes, tsunamis, forest fires, floods, mountains falling apart ect, ect...also what she allows to co-exist is questionable as well.
I cant see any predator that is in direct competition against lions and are capable to steak out any claims on (average terms) as in a animal that will drive back the full potential of there speices capabilitys; for instance lions vs hyenas, 6 are most of the time afraid of confrontations with a single male lion, and the most males I've seen in a single pride was 9; plus 22 females, a single lion on fair grounds could compete with a bloodlusted amount of hyenas at best I'd say 4 to one in favor of the lion, so in terms a hyena clan against the full capacity of a lion pride of 30, you would need hyenas outnumbering lions of at-least 3 to 1 odds, so around 80 or so are needed to push back or win.
But hyena nor wolves get that high in a single packs/clans, so the title of King of the beast still remains to the lions, two lions to one bear odds is more than a match for any type of bear, and more than 3 to 1 is just over; kill let alone the pride.
There are a few documentarys of lions against the atlas bear in rome, the lions 1 on 1 were reported doing the job. I fail to see how cougars/pumas was able to win out in many cases against black and brown bears but if thats what so many sources reported I am inclined to go with facts;*big cats are already pound for pound one of if not the best predators on land; in combineing all the right attributes and statistics; I think its safe to say with the proper analysis, that lions do own up and carry there title well as the King of the Beast, in...
-Looks
-Feats
-Sociality
-Heraldry
-Action
The data suggest that, and there is more than a few different catagories that paten's it as well...regardless of anyone down scaling the lions minor lost's here and there, if we go by high end feats; the lion wins out in terms almost every catagorie there is. And as one stated on page one, in comparisons...
It aint even close. (Data wise)