Rom Com Puns

The plot is Gilbert Gottfried playing himself is sent back in time to kill Stalin (also played by Gilbert Gottfried). But Gilbert ends up slowly falling in love with Stalin as they bond over things like pancakes shaped like barn animals and making snow angels. The movie ends with Gilbert and Stalin getting married and raising two kids named Jenny and Egor (played by Gilbert Gottfried) in the suburbs with their golden retriever, Rex (played by Gilbert Gottfried)

Does that mean it could be Zom-Rom-Com?

Hello,

I am requesting help with remembering a joke. Posts of this type did not seem to be against the subreddit's rules, but if I am in error, please let me know and delete my post.

Anyway, here is what I remember of the joke:

It is movie themed and it says something like this: "There should be a post-apocalyptic zombie movie with a romantic comedy element. Then we would have the world's first rom-com-zom-dom-bomb." The only thing is that I forget what the "dom" was supposed to mean and whether or not there is more to this joke, either in the set-up or the punchline. I googled it to no avail. Any help is appreciated.

Thank you

My mom thought is was the best Rom-Com she'd seen in years. My dad wanted to know where Clint Eastwood was.