Narrator: "This story is about an orange cat."
Spotlight; We see a figure in the distance. He's wearing a leather jacket and is turned away from us.
Narrator: But it's not-
Zoom
Narrator: About-
Zoom closer
Narrator: GARFIELD!

Heathcliff turns around, readying his baseball bat, giving the name "Garfield" a hard "THWACK!"
Heathcliff: "I'll take it from here. After all, this is -my- story!" He says with a smile and points to himself.

Heathcliff begins walking towards us, revealing he was standing in a dark alleyway. The background is him walking through the streets, crazy stuff happening while he talks.

Heathcliff: "Anyway, not many people know this, but-" He steals a fish from a market stall, swallowing it whole and tossing the bones. "But, I'm older than Garfield. And-"

Wide shot; Heathcliff winds up his bat, and smashes a mailbox.
We return to being in Heathcliff's view.

Heathcliff: "As I was sayin'" He continues, "This big, fat, orange cat's tainted my name, y'know? And in the streets, you'wa name's all ya got." He chuckles. "Well, that and ya fists."

We are now behind Heathcliff. He notices Arlene rummaging through a trashcan.
Heathcliff introduces himself.

Heathcliff: "Hey doll, the name's--"
Arlene: "Can it. I'm with Garfield."
Heathcliff's ears perk up.
Heathcliff: "Garfield? Well, I happen to be lookin' fer 'im..."

I got inspired by your comment and I also have been wanting to fuse their worlds in a comic somehow.