I normally get so sick of animal pictures, but you really managed to capture the magnificence of this one. It reminds me of a good street candid, because you seem to capture the heart and soul of this lion.
Nice capture and color. Again, depending what you had to work with, a slight crop variation, perhaps introducing more of that nice complementary colored bokeh on the left, may have enabled the lion to 'pop' more, but this does 'work' as is. Whether it is your lens, or pp work, there seems to be some slightly 'blown' areas in the whites/light colors, but that may be intentional, especially if you've gone for a 'soft feel'. Also difficult to discern at this size, but seems a slight gamma/whatever issue going into the black areas, especially top right near the ear, but very minor. Obviously fairly 'opportune', but a slight variation to 'incorporate' or 'exclude' the other eye, as it is noticeablely 'cut', would also have made this an even better shot in my opinion. Again, the frame is too large for this size, which at wall size likely looks good, but for 'here', takes up a lot of your 'pixel space' but this type of framing may be your intent, your call, obviously. Like to see the color more dominant in the eye(s), as well as that 'character scar', more detailed as well.