Now, with that spoiler warning out of the way, I'd like to present to you an observation I made recently. I came across a picture of several different lion skulls, completely unrelated to Steven Universe. However, when I noticed the shape of the nose cavity I was instantly reminded of Lion and I think this picture should make it clear why:

The nose cavity is a heart shape! Seeing as skulls and bones are often associated with death, I think that the peculiar shape of Lion's nose could have been foreshadowing that Lion is pink because he died and was revived by Rose.
Of course there's a good chance that this wasn't intentional. Hearts are a symbol of love, which fits with the theme of the show. It also could have been a design choice to make him appear cuter. If it wasn't intentional, it's still a really cool coincidence!
What do you think? Was this intentional or is it just a coincidence? Please let me know in the comments! Thank you for reading and goodbye until next time! ~Jay