Here you go:
Though I'm probably gonna have to dissect this frog as well
I thought the first version was good (though not great, kinda like my pareve cholent). Maybe delete the first sentence (there's a new airline Helvetic) because the name's already in the picture. Then shorten the second sentence to make it punchier, maybe:
"There's a new Serif in town and his name is Sans. Sans Serif."
It'd probably take even longer for readers to get it, but in a good way, I think, because when they finally do, they'll be so proud of themselves and more amused at your cleverness.